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20 questions
Which of the following describes covalent bonds?
Bonds form because of opposite charges
electrons are shared to fill outer electron shells
Electrons are transferred between atoms
Covalent bonds are magical
For representative elements (Groups 1A - 8A), the number of valence electrons is equal to
the group number
the period number
the atomic number
the group number minus 10
For metals (groups 1-3), its easier to _____ electrons to have a full outer shell.
gain
lose
share
For nonmetals (grousp 5-7), its easier to _____ electrons to have a full outer shell.
gain
lose
share
The octet rules states that most elements want to have _____ valence electrons.
2
4
6
8
Which type of bond has an unequal sharing of electrons between two atoms?
nonpolar covalent
polar covalent
ionic
mettalic
Ice has less density as compared to water due to ___________ bonds.
ionic
hydrogen
covalent
metallic
Water molecules tend to make _____________ bonds with each other.
ionic
polar covalent
metallic
hydrogen
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