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Ch 8, 8th Grade
Test Description: Atoms and bonding
Instructions: Answer all questions to get your test result.
1) Which information would you NOT find on the periodic table?
A
melting point
B
state at room temperature
C
atomic mass
D
chemical symbol
2) The horizontal rows on the periodic table are called
A
families
B
columns
C
periods
D
groups
3) An element that is shiny, conducts electricity well, and can be hammered into thin sheets is a
A
metalloid
B
nonmetal
C
metal
D
semi-metal
4) How many electrons can the first energy level of an atom hold?
A
4
B
2
C
6
D
8
5) The elements in Group 18 are stable, unreactive elements called
A
no nonsense gases
B
noble gases
C
royalty gases
D
snobby gases
6) Covalent compounds have which of the following characteristics?
A
low melting and boiling points
B
usually gases or liquids at room temperature
C
poor conductors
D
all of the above
7) A polar compound can be dissolved by
A
a nonpolar compound
B
another polar compound
8) Which type of bond occurs between a metal and a nonmetal?
A
polar
B
covalent
C
metallic
D
ionic
9) A neutral atom gains two electrons and becomes an ion. What is its charge?
A
2-
B
0
C
1-
D
2+
10) In a metallic compound, electrons are found in
A
jacuzzis
B
energy levels
C
electron clouds
D
pools
11) Metallic compounds are
A
all of the above
B
terrible conductors of electricity
C
usually liquids at room temperature
D
shiny
12) Nitrogen is in Group 15 of the periodic table. How many valence electrons does it have?
A
5
B
1
C
6
D
8
13) the outermost electrons of an atom that participate in chemical bonding
A
ions
B
valence electrons
C
polar electrons
D
isotopes
14) atoms that are no longer electrically neutral because they've gained or lost electrons
A
valences
B
isotopes
C
molecules
D
ions
15) group of chemical symbols and numbers that represent elements and numbers of atoms of each element that make up a compound
A
ionic bond
B
covalent bond
C
chemical bond
D
chemical formula
16) forms when two atoms share one or more pairs of valence electrons
A
ionic bond
B
metallic bond
C
isotope bond
D
covalent bond
17) Most of the matter around you is found as
A
gases
B
pure elements
C
native elements
D
compounds
18) Electrons that are farther away from the nucleus have ___ than ones closer to the nucleus
A
weaker charges
B
more energy
C
stronger charges
D
less energy
19) Nonmetals are more likely to ___ electrons
A
gain
B
lose
20) In the molecule H2O, how many hydrogen molecules are in it?
A
3
B
1
C
4
D
2
*select an answer for all questions
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