Atoms and Periodic Table Review
Complete each question
1. Who developed the first Periodic Table?
Dimitri Mendeleev developed the first Periodic Table of Elements.
2. How was the first periodic table organized?
The first Periodic Table was organized according to increasing atomic mass.
3. Who developed the modern periodic table?
Henry Moseley developed the Modern Periodic Table.
4. How is our current table organized?
The current Periodic Table is organized according to Atomic Number or number
of Protons.
5. What is a dot diagram?
The symbol for an element surrounded by the number of dots in the outer energy
level.
6. What is the name for a column on the periodic table?
The name for a vertical column on the Periodic Table is Family.
7. Describe Alkali Metals.
Family one
Silvery-colored metals with metallic luster
Soft, easily cut with a knife
Highly reactive, react with air and water immediately
Rarely found in nature alone
One electron in outermost level
8. Describe Alkaline Earth Metals.
Family 2
Metal with shiny, silvery white color
Reactive
2 electrons in outermost level
9. List the noble gases
Helium, Neon, Argon, Krypton, Xenon, Radon
10. How many electrons does hydrogen have in its outer level?
1
11. What are metals?
Shiny (luster)
Good conductors of heat and electricity
high density
Ductile
Malleable
Families 3-12: Transition metals
12. What are nonmetals?
Dull (no luster)
Poor conductors of heat and electricity
Brittle
Not ductile
Not Malleable
Low density
Low melting point
13. How can you identify the number of protons from looking at the Periodic Table?
You can identify the protons by looking at the Atomic Number on the Periodic Table.
14. What are metalloids?
Properties of metals and nonmetals
Solids
Can be shiny or dull
Ductile
Malleable
Conduct heat and electricity
(semiconductor)
15. What are the elements in family 17 known as?
Family 17 is known as the Halogens
16. What is a period?
A period is a horizontal row on the Periodic Table. Each period has a speciiifiiic
number of energy levels.
17. Where are the transition metals located?
The transition metals are located in families 3-12.
18. Fill in the chart showing the families and electrons in the outer most level.
Family Electrons in outer
level
1
1
2
2
13
3
14
4
15
5
16
6
17
7
18
8
Look at the periodic table and give the number of protons in the following elements.
19. Carbon
23. There are
24. There are
6
20. Potassium
3
19
21. Silver 47
electrons in the outermost level of a boron atom.
8
electrons in the outermost level of a Radon atom.
Draw a dot diagram for the following elements.
24. Nitrogen
N
. 22. Oxygen
25. Lithium
Li
8
.
26-30 Fill in the chart below
Element
Lithium
Lead
Gold
Iron
Copper
# of
# of
# of
Atomic
Symbol Atomic # protons electrons neutrons Mass
Li
3
3
3
4
7
Pb
82
82
82
125
207
Au
79
79
79
118
197
Fe
26
26
26
30
56
Cu
29
29
29
35
64
31. Explain how to use the Periodic Table to find the number of subatomic
particles in an atom.
The atomic number is the number of Protons. The number of Protons is
equal to the number of electrons. If you take the atomic mass and subtract
the number of protons, you will get the number of electrons.
32. Where are the subatomic particles located and what are their charges?
The positively charged protons are located in the nucleus of the atom. The
neutral neutrons are also located in the nucleus of the atom. The negatively
charged electrons move extremely fast orbiting the nucleus.