อะตอมและตารางธาตุ
เคมีม.4
1
ใบงานวิชาเคมี 1
(Chemistry Worksheets)
เรื่อง
อะตอมและตารางธาตุ
(Atom and Periodic Table)
ของ
________________________________________________
เลขที_่ _________ห้อง__________
สอนโดย
ครูองั คาร์ เทพรัตนนันท์
สานักงานเขตพืน้ ทีก่ ารศึกษามัธยมศึกษา เขต 11
โรงเรียนสวนศรีวทิ ยา จังหวัดชุมพร
Name_______________________________________________Class_________________No. _________________
Atom and Periodic Table
Mr.Angka Teprattananan
อะตอมและตารางธาตุ
เคมีม.4
2
Worksheet 1 Atomic Structure Problem
1. Draw Doltan Atomic Model
2. Draw Thomson Atomic Model
3. Draw Rutherford Atomic Model
4. Draw Bohr Atomic Model
5. Complete the chart for the three sub-atomic particles.
Particle name
Mass
Charge
Location in atom
Proton
Neutron
Electron
6. The nitrogen atom has 7 protons and 7 neutrons. Calculate:
the atomic number __________________
the mass number ___________________
7. The phosphorus atom has 15 protons and 16 neutrons. Calculate:
the atomic number __________________
the mass number ___________________
8. If a sulfur atom is neutral in charge and contains 16 protons in the nucleus, how many
electrons are present outside the nucleus?________________
9. Write the nuclear symbol for lithium, with 3 protons and 4 neutrons.________________
Atom and Periodic Table
Mr.Angka Teprattananan
อะตอมและตารางธาตุ
เคมีม.4
3
10. Fill in the blanks for the following nuclear symbols:
11
30
23
2+ 40
3+
Element
5B
14Si
12Mg
20Ca
Atomic Number
Mass Number
# of Protons
# of Neutrons
# of Electrons
70
31Ga
2+
35
317Cl
32
16S
2-
121
351Sb
11. Consider the following table on composition of some atoms.
Atom
# Protons
# Neutrons
# Electrons
I
26
29
26
II
25
29
24
III
18
20
18
IV
27
33
28
V
34
45
37
Atomic No.
Mass No.
Symbol
12. An isotope of silver has 47 protons , 46 electrons and 60 neutrons.
What is the atomic number? __________
What is the mass number? ___________
Write the complete isotopic symbol for the element.____________________
13. In a nuclear reactor, an isotope of uranium called U-235 is used. It has 92 protons
and a mass number of 235.
What is the atomic number? ____________
What is the mass number? ____________
How many electrons? _____________
Write the isotopic symbol ______________
14. Which of the following pairs of elements has the most neutrons?
a.
19
9
F
,
19
10
Ne
_________________
b.
44
20
Ca ,
44
22
Ti
_________________
15. What is the number of protons in an atom equal to? ______________________
16. How can you determine the mass number of an atom? ______________________
17. In an atom, what two particles are found in equal quantities? ______________________
18. How is the number of neutrons determined? ______________________
Atom and Periodic Table
Mr.Angka Teprattananan
อะตอมและตารางธาตุ
เคมีม.4
4
19. Can an atom’s atomic number change? Why or why not? _________________________________
________________________________________________________________________________________________________
20. Carbon (C)
Carbon (C)
atomic number = 6
atomic number = 6
mass number = 12
mass number = 14
protons
protons
electrons
electrons
neutrons
neutrons
What is the difference between the two carbon atoms?
What are the two sets of atoms called?
21. For each of the following ,check the blank for isotope , isotone , isobar or isoelectronic
Nuclear symbols
30
30
14Si &
15P
19
20
F
&
Ne
9
10
16
18
O
&
8
8O
20
24
2+
10Ne &
12Mg
3
4
2He & 2He
79
2& 8035Br34Se
37
37
17Cl &
18Ar
24
2+
& 199F12Mg
isotope
isotone
isobar
isoelectronic
Isotope is same ____________________________
Isotone is same ___________________________
Isobar is same ____________________________
Isoelectronic is same ______________________
Atom and Periodic Table
Mr.Angka Teprattananan
อะตอมและตารางธาตุ
เคมีม.4
WorkSheet 2
5
Atomic Structure Problem
Fill in the blanks with Proton , Neutron and Electron
1. ___________________Located outside the nucleus.
2. ___________________Discovered by Chadwick.
3. ___________________ , ___________________Called nucleons.
4. ___________________Carries a positive charge.
5. ___________________Discovered first.
6. ___________________Called the atomic number.
7. ___________________Has a diameter size of 10-18 km.
8. ___________________Located in the energy levels.
9. ___________________ , ___________________Have a mass of 1 amu
10. ___________________ + is the symbol for its charge.
11. ___________________Responsible for compound formation.
12. ___________________ Discovered by J.J. Thomson.
13. ___________________ - is the symbol for its charge.
14. ___________________ Carries a negative charge.
15. ___________________ Determines isotopes.
16. ___________________ , ___________________ Located in the nucleus
17. ___________________ , ___________________ Carries the charge to give the atom zero charge.
18. ___________________ , ___________________ Makes up the major portion of atomic mass.
19. ___________________ Responsible for chemical reaction.
20. ___________________ Carries a neutral charge.
21. ___________________ Moves from place to place.
22. ___________________ Determines the kind of element.
23. ___________________ 0 is the symbol for its charge.
24. ___________________ Equals the number of proton in a neutral atom.
25. ___________________ Has a mass of 1/1836 amu.
26. ___________________ Responsible for the charge of the nucleus.
27. ___________________ , ___________________ Diameters are 10-14 km.
28. ___________________ Responsible for the charge of energy levels.
Atom and Periodic Table
Mr.Angka Teprattananan
อะตอมและตารางธาตุ
เคมีม.4
Worksheet 3
One full wave (cycle)
6
Wave and Bohr Atomic Model
Wave train – two or more waves
Amplitude – measures the energy of a transverse wave
a) measured from the equilibrium position to the top of a crest or the bottom of a
trough (see vertical arrow)
Wavelength – length of a single wave cycle (horizontal arrow double sided arrow)
Frequency- number of waves that pass a point in a given amount of time
Speed = wavelength x frequency
The time from the beginning to the end of the wave train in each situation is 2 second.
Wave 1
a) How many waves are there in this wave train? _____
b) Wavelength ______ cm
c) Amplitude _______ cm
e) speed _______ cm/s
d) frequency ________ Hz
Wave 2
a) How many waves are there in this wave train? _____
b) Wavelength ______ cm
c) Amplitude _______ cm
e.) speed _____ cm/s
Atom and Periodic Table
d) frequency ______ Hz
Mr.Angka Teprattananan
อะตอมและตารางธาตุ
เคมีม.4
7
Wave 3
a) How many waves are there in this wave train? _____
b) Wavelength ______ cm
c) Amplitude _______ cm
e.) speed _____ cm/s
d) frequency ______ Hz
Bohr Model Diagrams
Use the information provided for each element to draw Bohr Model diagrams. Rather than
drawing individual protons and neutrons, you may simply label how many of each there are
in the nucleus (e.g. He: 2p, 2n). Then, draw the individual electrons on the appropriate
energy levels (keep in mind the maximum number of electrons allowed on each level).
1. Beryllium – atomic #: 4, # of n: 5
2. Sodium – atomic #: 11, # of n: 12
3. Sulfur – atomic #: 16, # of n: 16
Atom and Periodic Table
4. Calcium – atomic #: 20, # of n: 20
Mr.Angka Teprattananan
อะตอมและตารางธาตุ
เคมีม.4
8
WAVELENGTH, FREQUENCY, & ENERGY PROBLEMS
Wavelength Ranges for Visible Light:
Red 700 - 650 nm
Orange 649 - 580 nm
Yellow 579 - 575 nm
Green 574 - 490 nm
Blue 489 - 455 nm
Indigo 454 - 425 nm
Violet 424 - 400 nm
______________1. Which has the longer λ, blue or indigo light?
______________2. Which has the greater ν, red or yellow light?
______________3. Which has the greater energy, a photon of yellow light or a photon of
green light?
______________4. Which has the longer wavelength, light with a frequency of 7.32 x 1014 Hz
or a frequency of 6.0 x 1014 Hz?
______________5. Which has higher energy, light with a λ of 674 nm or a λ of 480 nm?
______________6. Which has a higher frequency, orange light or indigo light?
______________7. Find the color of light whose frequency is 5.21 x 1014 Hz.
______________8. What is the frequency of light if its wavelength is 5.4 x 10-5 cm?
______________9. Find the wavelength in nanometers of light whose frequency is 7 x 1014 Hz.
_____________10. Is the light in # 10 visible?
_____________12. How many Joules of energy are there in one photon of yellow light whose
wavelength is 630 nm?
_____________13. Find the color of light whose photon has 4.75 x 10-19 J of energy.
Atom and Periodic Table
Mr.Angka Teprattananan
อะตอมและตารางธาตุ
เคมีม.4
9
Worksheet 4
Electron Configuration
1. Write a ground state electron configuration (using spdf configuration).
N:
Na :
P:
K:
Fe :
Mn :
Sr :
2. Write a ground state electron configuration ((using spdf configuration).
O2- :
Fe2+ :
B
3+
:
K+ :
Br- :
Cr6+ :
3. If each orbital can hold a maximum of two electrons, how many electrons can each of
the following hold?
A) 2s _________
B) 5p _________
C) 4f _________
D) 3d _________
4. Shape of an s orbital ______________
How many s orbitals? ______________
5. Shape of an p orbital ______________
How many p orbitals? ______________
6. How many d orbitals? ______________
How many d electrons? ______________
7. How many f orbitals? ______________
How many f electrons? ______________
Atom and Periodic Table
Mr.Angka Teprattananan
อะตอมและตารางธาตุ
เคมีม.4
10
8. Which of the following notations shows the electron configuration of a neutral atom in an
excited state? Name the element, and explain how you know it is excited:
A) 1s2 2s22p1
B) 1s2 2s22p3 3s1
C) 1s2 2s22p6 3s2 3p1
D) 1s2 2s22p6 3s2 3p3 4s1
9. For the following elements list the shorthand electron configuration (noble gas
configuration):
A) Boron
B) Cadmium
C) Phosphorus
D) Manganese
E) Antimony
10. For the following elements list the orbitals diagram of electron configuration:
A) Nitrogen
B) Calcium
C) Iron
D) Chlorine
E) Rubidium
Atom and Periodic Table
Mr.Angka Teprattananan
อะตอมและตารางธาตุ
เคมีม.4
Worksheet 5
11
Periodic Table
1. Periodic means _______________________________________________________________________________
2. What is a group (or family)? __________________________________________________
What is a period? __________________________________________________
3. How can you determine the number of electrons in an element’s outer energy level by
the group it’s in? ___________________________________________________________________________________
4. What is the octet rule? _____________________________________________________________________
_____________________________________________________________________________________________________
5. Why do elements that make positive ions occur on the left side of the periodic table
while those that make negative ions occur on the right? ____________________________________
_____________________________________________________________________________________________________
6. Complete the following table.
Group
Common Name
1A
2A
3A
6A
7A
8A
Charge on Ions of this Group
7. Predict the charges on ions of the following atoms.
Ra _______________
Cs _______________
Ga _______________
As _______________
In _______________
S _______________
Te _______________
At _______________
Sr _______________
8. a) In group 1, which element is the most active? _______________
b) Metallic activity tends to (increase, decrease) as one goes down Group 1. ___________
9. a) Which element is most active in group 7A? _______________
b) Nonmetal activity tends to (increase, decrease) as one goes down Group 7A. _______
Atom and Periodic Table
Mr.Angka Teprattananan
อะตอมและตารางธาตุ
เคมีม.4
10. Choose the element in each pair that has the largest radius:
a) K or Br
b) F or Br
12
c) He or Rn
11. Name all the elements called metalloids.
________________________________________________________________________________________________________
________________________________________________________________________________________________________
12. Periodic Table Scavenger Hunt
1. Which element is a metal: Ba (56) or At (85)? ______________
2. Which period is Ca (20) in? ______________
3. What is the number of the group N (7) is in? ______________
4. Which element is an alkali metal: Rb (37) or Al (13)? ______________
5. Which element is a halogen: Na (11) or Cl (17)? ______________
6. Which element is a noble gas: Ne (10) or Br (35) or O (8)? ______________
7. Which element is the most active nonmetal? ______________
8. Which element is the most active metal? ______________
9. Which element has the largest radius: Na (11) or Cs (55)? ______________
10. Which element would be a positive ion in a compound: Sr (38) or Te (52)? _____
11. How many electron dots should As have? ______________
12. Which element has the highest ionization energy: K (19) or Kr (36)? ____________
13. When Te (52) is an ion in a compound, what charge does it have? ______________
14. How many is an octet of electrons? ______________
15. Which element has 5 valence electrons? B (5) or P (15)? ______________
16. Which element has 18 electrons when it is an ion with a –1 charge? ______________
17. What atomic number would an isotope of U (92) have? ______________
Atom and Periodic Table
Mr.Angka Teprattananan
อะตอมและตารางธาตุ
เคมีม.4
Worksheet 6
13
Periodic Table
Use a periodic table to help you answer the following questions.
1. Which element in the second period has the greatest atomic radius?
2. Which of the group IIIA elements is the largest?
3. Of the halogens, which has the smallest radius?
4. Which of the alkaline earth metals is the largest?
5. Which of the transition metals has the smallest atomic radius?
6. Which of the noble gases is the smallest?
7. The atomic radius of which element is the largest?
8. Which of the metalloids has the smallest atomic radius?
9. Which of the rare earth elements is the smallest?
10. Are metal ions larger or smaller than the neutral atoms they came from?
11. Are cations larger or smaller than the neutral atoms they came from?
12. Are ions of alkali metals larger or smaller than ions of alkaline earth
metals from the same period?
13. Which of the group IIIA elements has the largest ionization energy?
14. Of the halogens, which has the smallest electronegativity?
15. Which of the alkaline earth metals has the smallest electronegativity?
16. Which of the transition metals has the largest ionization energy?
17. Which of the group IVB metals is the least active?
18. Which of the halogens is the most active?
19. Which of the transition metals in the fifth period has the largest EN?
20. Which of the group four metals has the largest ionization energy?
21. Which of the non-metals in the third period is the most active?
Atom and Periodic Table
Mr.Angka Teprattananan
อะตอมและตารางธาตุ
เคมีม.4
Worksheet 7
14
Periodic Trends
1. Provide definitions for the following:
Ionization Energy:
Electron Affinity:
Electronegativity :
2. Fill in the blank:
IE , EN EA ______________ as you move up a group, and _________________ as you move
from right to left in a period.
3. Answer the following questions by circling the correct element.
1. Which is more electronegative?
Na
Rb
2. Which has the smallest radius?
Mo
Y
3. Which has the lower ionization energy?
Ga
Se
4. Which has the higher electron affinity?
Al
S
5. Which is less electronegative?
Ir
Co
6. Which has the larger radius?
W
Os
7. Which has the higher ionization energy?
Be
Ba
8. Which has the lower electron affinity?
Rb
Sr
9. Which has the smallest radius?
Au
Ag
10. Which is less electronegative?
Br
F
Atom and Periodic Table
Mr.Angka Teprattananan
อะตอมและตารางธาตุ
เคมีม.4
15
4. Draw arrows that indicate the direction that each trend (IE , EA , EN) increases on the
periodic table.
F
Fr
5. Order the following in terms of increasing ionization energy: Mn, Co, V, Sc, Zn
6. Order the following in terms of increasing electron affinity: Al, In, Tl, B, Ga
7. Order the following in terms of decreasing atomic radius: Ba, Cs, Hf, La, Ta
8. Order the following in terms of increasing electronegativity: N, F, C, O, B
9. Order the following in terms of increasing melting point : Al, Si, K, O, Se
10. Order the following in terms of increasing boiling point : Rb, Na, Al, F, Cl
11. Choose T for a true statement, F for a false statement.
T
F
1. Technetium is more electronegative than zirconium.
T
F
2. Sulfur has a smaller atomic radius than silicon.
T
F
3. Potassium has a higher ionization energy than cesium.
T
F
4.
T
F
5. Aluminum has a higher chemical activity than sodium.
T
F
6.
Tin has a larger electron affinity than iodine.
T
F
7.
Arsenic is more likely to gain an electron than bromine.
T
F
8.
Manganese has a lower electron affinity than nickel.
T
F
9.
Calcium will lose an electron easier than beryllium.
Atom and Periodic Table
Chlorine is less electronegative than fluorine.
Mr.Angka Teprattananan
อะตอมและตารางธาตุ
เคมีม.4
16
Worksheet 8 Oxidation Number
Find the Oxidation number of underline elements.
1. CO
2. CH4
3. SO3
4. Al2O3
5. S2Cl2
6. BaSO4
7. MgCrO4
8. Sr(NO3)2
9. IF3
10. K2MnO4
11. [Fe(CN)6]3-
12. Cr(OH)3
13. NiCl2.6H2O
14. K3[Fe(CN)6]
15. [Cu(NH3)4]SO4
16. [Mn(H2O)6]3+
17. (NH4)2[NiCl4]
18. Co(BrO3)3
19. Pb(ClO2)4
20. PbCl2.Pb3(PO4)2
Atom and Periodic Table
Mr.Angka Teprattananan
อะตอมและตารางธาตุ
เคมีม.4
Worksheet 9
Complete the bank.
1. 31H ----> ______ +
3.
144
5.
40
7.
1
0n
9.
129
53I
11.
239
94Pu
58Ce
19K
144
---->
0
----> ______ +
235
+
92U
---->
---->
129
54Xe
2.
232
+ ______
4.
65
0
6.
7
8.
222
+1e
141
55Cs
12.
15
60
Daughter
Hg
223
2He
Co*
60
53
Co
40
90
7N
+ ______
Equation
Pa
52
Fe
90
S
15
______+0+1e
I
Nb
31
---->
---->
2He
136
40
Bi
1H
4
Co
K
209
+ ______
----> ______ +
1
+1e
Pt
223
I
+
4Be
0
176
Th
137
8O
7
---->
86Rn
4
+ ______
----> ______ +
4Be*
1
1H
228
88Ra
---->
30Zn
10.
Parent
180
+ ______+310n
92U
+ ______
----> ______ +
Radioactive decay
Nuclear Equation
-1e
59Pr
17
Ar
Zr
210
31
Bi
P
Using your knowledge of nuclear chemistry, write the equations for the following processes:
1) The alpha decay of radon-198
2) The beta decay of uranium-237
3) Positron emission from silicon-26
4) Sodium-22 undergoes electron capture
5) When protactinium-229 goes through two alpha decays, francium-221 is formed.
Atom and Periodic Table
Mr.Angka Teprattananan
อะตอมและตารางธาตุ
เคมีม.4
Worksheet 10
18
HALF-LIFE
Use Reference Table on side to assist you in answering the following questions.
half lifes: As-81 = 33 seconds , Au-198 = 2.69 days , C-14 = 5730 years
1. How long does it take a 100.00g sample of As-81 to decay to 6.25 g ?
2. How long does it take a 180g sample of Au-198 to decay to 1/8 its original mass ?
(Ans. 8.07 days)
3. What percent of a sample of As-81 remains un-decayed after 43.2 seconds ?
4. What is the half-life of a radioactive isotope if a 500.0 g sample decays to 62.5 g in
24.3 hours ? (Ans. 8.1 hours)
5. How old is a bone if it presently contains 0.3125g of C-14, but it was estimated to have
originally contained 80.000g of C-14?
Atom and Periodic Table
Mr.Angka Teprattananan
อะตอมและตารางธาตุ
เคมีม.4
19
6. How much of a 100.0 gram sample of gold-198 is left after 8.10 days if its half-life is
2.70 days ?(Ans. 12.5 gram)
7. A 50.0 grams sample of nitrogen-16 decays to 12.5 grams in 14.4 seconds. What is its
half-life ?
8. The half-life of potassium-42 is 12.4 hours. How much of a 728 gram sample is left
after 62.0 hours ? (Ans. 22.75 gram)
9. What is the half-life of technetium-99 if a 500.0 gram sample decays to 62.5 grams in
639,000 years ?
10. The half-life of thorium-232 is 1.4 x 1010 years. If there are 25.0 grams of the sample
left after 2.8 x 1010 years, how many grams were in the original sample ? (Ans. 100 gram)
Atom and Periodic Table
Mr.Angka Teprattananan
Atom and periodic table
Angka Teprattananan