A cation with two units of charge has 10 neutrons and 8 protons. The ion also has .
Which statement is true of the molecule shown here?
It's both a cation and an anion.
The atoms shown here will become ions if they meet because .
atoms tend to have filled valence shells.
True or false: Ions may form by transferring an atomic nucleus (with or without electrons) to another
Covalent bonds hold atoms together because they .
do both (a) and (b).
In molecules, C, H, O, and N atoms usually make __, __, __, and __ bonds respectively.
4, 1, 2, 3
An atom's atomic number is 7. Its valence is most likely .
By making two covalent bonds, an O atom (with 8 protons) fills its valence shell. Why does the atom's
charge stay close to zero?
Shared electrons aren't always near oxygen.
In a double covalent bond, a carbon atom shares .
electrons in two orbitals.
The ammonia molecule in the diagram has the observed bond orientation because .
All of the above.
Without making or breaking bonds, the pictured molecule can change its shape because .
rotation can occur around single bonds.
Two C atoms form a double bond. Each C is bound to two H atoms. Which statement is true?
All the atoms lie in a plane.
Partial charges occur when .
(b) atoms share electrons unequally.
To fill the valence shell, an electrically neutral, unbonded atom with atomic number 8 must add .
Which answer helps to explain why carbon atoms tend to make 4 covalent bonds?
The valence shell needs 8 electrons.
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