Physical Science: Chemistry, Book L

Section 1: Why do atoms combine?

Self-Check Quiz-Eng.

1.
Most of an atom's mass is contained in __________.
A)the electron orbits
B)its nucleus
C)the electron cloud
D)its outer energy shell
2.
What is one difference between satellites and electrons?
A)You can calculate exactly where an electron will be at any time. A satellite's position must be estimated.
B)Satellites have positive electrical charges. Electrons have negative charges.
C)You can calculate exactly where a satellite will be at any time. An electron's position must be estimated.
D)Satellites have a larger negative charge than electrons.
3.
The atomic number of calcium is 20. How many protons does a calcium atom contain?
A)10
B)40
C)0
D)20
4.
A chlorine atom has 17 protons and 18 neutrons. How many electrons does it have?
A)18
B)35
C)1
D)17
5.
The __________ an energy level is from the nucleus, the __________ electrons it can hold.
A)farther, more
B)farther, fewer
C)closer, more
D)farther, more tightly bound
6.
Electrons in the sphere closest to the nucleus are in the __________ energy level.
A)highest
B)lowest
C)middle
D)negative
7.
How many electrons does an atom of carbon have in its outer energy level?
A)6
B)8
C)4
D)12
8.
What do lithium, sodium, and potassium have in common?
A)They are all metalloids.
B)They all have two electrons in their outer energy levels.
C)They are all nonmetals.
D)They are all Group I elements.
9.
The first version of the periodic table of the elements was created by __________.
A)Mendel
B)Mendeleev
C)Mendelssohn
D)Minsk
10.
Which of the following is NOT true of the elements in Group 18?
A)They are all metalloids.
B)Their outer energy levels are complete.
C)They include the noble gases.
D)They are all nonmetals.
11.
A(n) __________ is a force that holds two atoms together.
A)isotope
B)chemical compound
C)chemical bond
D)ion
12.
A(n) __________ is a method of representing atoms and the electrons in their outer energy levels.
A)electron dot diagram
B)chemical symbol
C)chemical formula
D)chemical equation
13.
What do atoms of boron and aluminum have in common?
A)They are metals.
B)They are metalloids.
C)They have the same number of neutrons in their nuclei.
D)They have three electrons in their outer energy levels.
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