Name: ______________________ Class: _________________ Date: _________
ID: A
PRACTICE TEST: ChemCom Unit 1B part 1(6th Edition) 2014-15(gro)
Matching: Match the description of the atom or ion with the correct charge.
a. Neutral atom
b. Charge = +1
c. Charge = +2
1. FLUORINE:
9 protons 10 electrons
2. FLUORINE
9 Protons, 9 electrons
3. BARIUM
4. SODIUM
d.
e.
Charge = -1
Charge = -2
56 Protons, 54 electrons
11 protons 10 electrons
True/False Use your periodic table to analyze the statements below.
Indicate whether the statement is true or false. A=True B=False
5. An isotope of an atom of Silicon-27 has 14 PROTONS.
6. An isotope of an atom of ALUMNIIUM-27 has 14 protons.
7. A atom of PHOSPHORUS has 14 protons.
8. A neutral atom of ALUMINIUM has 13 electrons.
Multiple Choice
Identify the choice that best completes the statement or answers the question.
9. Which of these elements is a NOT A metalloid?
a. Si
c. As
b. Ge
d. Cu
10. Which statement correctly describes how ALUMINIUM-26 is different comparred to ALUMINIUM-27.
a. Both nuclei have the same number of neutrons.
b. ALUMINIUM 27 HAS MORE PROTONS THAN ALUMINIUM 26.
c. ALUMINIUM 27 HAS MORE NEUTRONS THAN ALUMINIUM 26
d. ALUMINIUM 27 HAS MORE ELECTRONS THAN ALUMINIUM 26
11. Which person developed the Periodic Table based on the properties of the elements?
a. R. BUNSEN
c. Dimitri Mendeleev
b. EARL N. MEYER
d. CHEM E. STREE
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Name: ______________________
ID: A
12. Find the slope of the data BELOW COLLECTED WHEN A STUDENT HEATED CALCIUM IN THE
AIR.
a. 3
2
c.
2.5 GRAMS OF OXYGEN
GRAM OF CALCIUM
b. 2.5 GRAMS CALCIUM
GRAM OF OXYGEN
d.
0.4 GRAMS OXYGEN
GRAM OF CALCIUM
c.
d.
Ca
Na
13. Which symbol representS an ion?
a. H
b. Cl–
14. ON THE PERIODIC TABLE, PERIODS GO
a. VERTICALLY
c.
b. DIAGONALLY
d.
HORIZONALLY
RANDOMLY
15. Which list has elements that are all in the same FAMILY?
a. Br, Xe, At
b. Cu, Ag, Zn
c. Al, Ge, In
d. F, Cl, Br
e. Sn, Sb, Te
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Name: ______________________
ID: A
16. The boiling point of O is 90 Κ while the boiling point of Se is 958 K. Estimate the boiling point of S in Κ.
a. 50 K
b. 718 K
c. 1050 K
d. 2000 K
e. 3012 K
17. When an atom turns into a positive or negative ion, it must gain or lose
a. electrons.
c. isotopes.
b. protons.
d. neutrons.
18. Which elements are halogens?
a. F, Cl, Br
b. Group 18 (last column on the right)
Group 1 (first column on the left)
Mg, Ca, Sr
c.
d.
19. Vertical columns of elements in the periodic table are called groups or
a. Rows.
c. Series.
b. Periods.
d. Families.
20. When an atom of calcium becomes a calcium ion (Ca2+), the atom must
a. lose two protons
c. lose two electrons
b. gain one neutron
d. gain one electron
21. How many protons are in the nucleus of an atom of Germanium?
a. 23
c. 11
b. 12
d. 32
22. If an atom of potassium atom becomes a positive ion with a + 1 charge it
a. gains a proton.
c. gains an electron
b. gains a neutron.
d. loses an electron
23. Which statement is true about elements on the periodic table?
a. K, Mn, Ni, Ag - are all in the same period.
b. Be, C, O, F - are all in the same family.
c. Rb, Ag, Sn, Xe - are all in the same group.
d. F, Ne, O, N - are all in the same period.
24. What is the number of electrons in a Beryllium ion, Be2+?
a. 0
c. 4
b. 2
d. 6
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Name: ______________________
ID: A
25. Calculate the slope of the data collected by students heating a sample of sodium in the air and then write a
“for every” story to describe the experiment.
a.
c.
For every 10 grams of oxygen, 30
grams of sodium reacted.
b.
For every gram of sodium, about 0.35
grams of oxygen reacted.
d.
For every gram of sodium, about 2.8
grams of oxygen reacted.
For every 0.5 slope units, the graph
increases.
26. The elements in the original periodic table were arranged by mass. Now the periodic table is arranged by
a. atomic mass (# protons + # neutrons)
b. density
c. size
d. net charge (# protons comparred to the # electrons)
e. atomic number (# of protons)
27. What is the name of the element that has a nucleus with 15 neutrons, 15 electrons and 17 protons?
a. Phosphorus-32
c. Helium-32
b. Chlorine-32
d. Germanium-32
28. Negative ions ______ electrons, positive ions _________ electrons.
a. gain, lose
c. gain, gain
b. lose, gain
d. lose, lose
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Name: ______________________
ID: A
29. Which statement is false about the structure of a atom in the modern model
a. the electrons are located in the center of the atom
b. the electrons are located outside the nucleus
c. a positive nucleus that contains protons and neutrons
d. the nucleus is made of neutrons and protons with electrons orbiting around it.
30. What is the total number of neutrons in the einsteinium shown below?
a. 99
b. 153
252
351
c.
d.
31. Which of these elements is a nonmetal element?
a. Mg
c. Na
b. Cl
d. Au
32. What is the mass number of the einsteinium shown below?
a. 99
b. 153
252
351
c.
d.
33. The charge of an atom is calculated by comparring the
a. protons + electrons.
c. neutrons, only.
b. protons, only.
d. neutrons + protons.
34. Which of these elements is most chemically similar to chlorine?
a. Br
c. S
b. Ar
d. Al
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Name: ______________________
ID: A
35. Lithium, sodium and potassium are part of which group or family?
a. Noble gas
c. Alkali Metal
b. Halogen
d. Transition Metals
36. The melting point of Potassium is 337 K while the melting point of Rubidium is 312 K. Estimate the
melting point of Cesium in Κ.
a. 340 K
b. 337K
c. 320 K
d. 315 K
e. 302K
37. The negatively charged particles in an atom are called
a. Neutrons
c. Electrons
b. Protons
d. Positrons
38. Which symbol represents a metal in the fourth period?
a. Mg
b. Be
c. Ca
d. F
e. Au
39. All atoms of different isotopes must have the same number of ______, but change their mass by changing
the number of ________.
a. protons, neutrons.
b. neutrons, protons.
electrons, protons.
electrons, neutrons.
c.
d.
40. The nucleus of an atom of iron with a mass number of 54 has
a. 30 protons and 26 neutrons
c. 26 protons and 30 neutrons
b. 26 protons and 28 neutrons
d. 30 protons and 30 neutrons
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