How many valence electrons can an atom have?

Answer 1

That depends on the element in question.

Atoms can have anywhere from 1 to 8 valence electrons. For the main group elements, Groups 1,2,13-18, the number of valence electrons are the number in the one's place in their group number, as follows:

Group 1 Elements: 1 valence electron

Group 2 Elements: 2 valence electrons

Group 13 Elements: 3 valence electrons

Group 14 Elements: 4 valence electrons

Group 15 Elements: 5 valence electrons

Group 16 Elements: 6 valence electrons

Group 17 Elements: 7 valence electrons

Group 18 Elements: 8 valence electrons

The transition metals, Groups 3 - 12, are more complicated because they are adding d electrons, some of which behave like valence electrons, and many transition metals can have different numbers of valence electrons. For example manganese can have anywhere from 2 to 7 valence electrons.

Answer 2

8. Valence electrons are the outer ring of electrons. Once you get to 8 you start a new ring. There are some instances when this is untrue, but as a rule the answer is 8

Answer 3

18 is the most valence electrons there can be in an atom, these elements are in periods 4-7

Answer 4

It can have 8 valence electrons.

Answer 5

8 8

Answer 6

8

Answer 7

8