REVIEW
The Atom
Element Atomic
Mass
# of
# of
# of
or Ion Number Number Protons Neutrons Electrons
Ag
47
108
47
61
47
C
6
12
6
6
6
Cl-
17
35
17
18
17
Be
4
9
4
5
4
Mg+2
12
24
12
12
10
1. Explain how the elements change going from one group to the next?
Increase in electrons
2. How are electron dot diagrams drawn?
Chemical symbol with valence electrons
3. Which group contains elements with 7 valence electrons?
Group 17, Halogens
4. Draw the electron dot diagram for Al.
5. How is the modern periodic table organized?
Increasing atomic number
6. What are the horizontal rows in the periodic table called?
periods
7. What does malleable mean?
Easily hammered into thin sheets
8. What does ductile mean?
Able to pull into thin wire
9. Where are the most reactive metals located?
Group 1, Alkali metals
10.What are the physical properties of metals? Non-metals?
Shiny, malleable, ductile…… Dull and brittle
11.What property indicated the number of protons in an atom?
Atomic Number
12.What is a column in the periodic table called?
Group or family
13.What is conductivity?
Transfer of heat and electricity
14.Explain the reactivity of metals from left to right across the periodic
table.
Reactivity decreases
15.Are nonmetals good conductors of heat and electricity?
NO
16.Who organized the first period table?
Mendeleev
17.What is a chemical symbol?
One or two letters that represent an element
18.What is the nucleus?
Small center core of an atom
19.How did Mendeleev arrange the elements on the periodic table?
Increasing atomic MASS
20.What did Rutherford infer about the atom?
That an atom’s positive charge is clustered in the nucleus
21.List the chemical properties of metals.
Very reactive, form positive ions when they lose electrons
22.Which group contains the most elements?
Metals
23.What do the number of protons equal in a neutral atom?
Number of electrons
24.What does the atomic number tell you?
Identifies the element and tells you the number of protons
25.What are the two most common alkaline earth metals?
Magnesium and calcium
26.What do you know about transition metals?
They include familiar metals such as gold, silver, copper, and nickel
27.What are metalloids?
Elements that share characteristics with both metals and nonmetals
28.Which elements do not normally form compounds?
Noble gases
29.Name the subatomic particles and their charges.
Proton – positive Neutron – neutral Electron - negative
30.What elements are in the halogen family?
Fluorine, chlorine, bromine, and Iodine
31.Each family have characteristic properties that are based on the
number of what?
Valence electrons
32.What is a positive ion?
Formed when an atom loses an electrons
33.What is a negative ion?
Formed when an atom gains electrons
34.What are polyatomic ions?
Ions that are made of more than one atom
35.What is the greatest number of valence electrons an atom can have?
8
36.If atoms of family 16 gain two electrons then how many valence
electrons will those atoms have?
8