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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
atomic mass
B
chemical symbol
C
melting point
D
state at room temperature
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
semi-metal
B
nonmetal
C
metalloid
D
metal
4) How many electrons can the first energy level of an atom hold?
A
4
B
6
C
8
D
2
5) The elements in Group 18 are stable, unreactive elements called
A
no nonsense gases
B
royalty gases
C
snobby gases
D
noble gases
6) Covalent compounds have which of the following characteristics?
A
poor conductors
B
all of the above
C
low melting and boiling points
D
usually gases or liquids at room temperature
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
ionic
B
polar
C
covalent
D
metallic
9) A neutral atom gains two electrons and becomes an ion. What is its charge?
A
1-
B
0
C
2+
D
2-
10) In a metallic compound, electrons are found in
A
electron clouds
B
energy levels
C
jacuzzis
D
pools
11) Metallic compounds are
A
usually liquids at room temperature
B
all of the above
C
terrible conductors of electricity
D
shiny
12) Nitrogen is in Group 15 of the periodic table. How many valence electrons does it have?
A
6
B
1
C
5
D
8
13) the outermost electrons of an atom that participate in chemical bonding
A
valence electrons
B
isotopes
C
polar electrons
D
ions
14) atoms that are no longer electrically neutral because they've gained or lost electrons
A
ions
B
valences
C
isotopes
D
molecules
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
chemical bond
C
chemical formula
D
covalent bond
16) forms when two atoms share one or more pairs of valence electrons
A
metallic bond
B
covalent bond
C
isotope bond
D
ionic bond
17) Most of the matter around you is found as
A
gases
B
compounds
C
pure elements
D
native elements
18) Electrons that are farther away from the nucleus have ___ than ones closer to the nucleus
A
less energy
B
weaker charges
C
more energy
D
stronger charges
19) Nonmetals are more likely to ___ electrons
A
gain
B
lose
20) In the molecule H2O, how many hydrogen molecules are in it?
A
2
B
4
C
1
D
3
*select an answer for all questions
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