Ions - Ch 7.1

Valence electrons are the electrons found in the nucleus of an atom.

Valence electrons are all the electrons surrounding the nucleus of the atom.

Valence electrons are the electrons in the lowest occupied energy level.

Valence electrons are the electrons in the highest occupied energy level.

Count the number of electrons in the outermost energy level.

The number of valence electrons is equal to the Group Number for the first two columns of elements.

The number of valence electrons is equal to the Group Number minus 10 for the elements in groups 13 through 18.

All answers are correct.

True

False

5

6

8

9

gain

lose

gain

lose

positive ion that gains electrons.

positive ion that loses electrons.

negative ion that gains electrons.

negative ion that gains electrons.

 $Ca^{+1}$  

 $Ca^{+2}$  

 $Ca^{-2}$  

 $Ca^{-1}$  

$Na^{+1}$

$Na^{+2}$

$Na^{-1}$

$Na^{-2}$

positively charged ion that has gained electrons.

positively charged ion that has lost electrons.

negatively charged ion that has gained electrons.

negatively charged ion that has lost electrons.

$Cl^{-1}$

$Cl^{+2}$

$Cl^{-2}$

$Cl^{+1}$

$O^{-1}$

$O^{+1}$

$O^{-1}$

$O^{-2}$