# I  dont know how many eletrons would an atom from the following elements lose or gain. I need help?                           lose                   ...

I  dont know how many eletrons would an atom from the following elements lose or gain. I need help?

lose                    gain

helium

oxygen

carbon

sodium

chlorine

jerichorayel | College Teacher | (Level 2) Senior Educator

Posted on

to understand the gaining or losing of an electron an atom can have, first we have to relate it in their group number. Let me show you a similar example for this one.

hints:

group 1 = lose 1 electron

group 2= lose 2 electrons

group 15 = gains 3 electrons

group 16 = gains 2 electrons

group 17 = gains 1 electron

group 18 = neither gains or lose electrons

Look to what group does each of the atoms belong and you will know how many electrons a particular atom can gain or lose.

for example

Ca in group 2 therefore it will lose 2 electrons

I is in group 17 therefore it will gain an electron.

for your question, let us try Oxygen.

Oxygen is in group 16 and according to our data it will gain 2 electrons.

If an atom already gained an electron, you will leave the the lose as blank

lose    gain

oxygen          0         2

hope this helps :)

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