Question

why are we using - and + signs in elements like Na + etc..​

Answer 1

Answer:

Explanation:

for this we must know atomicity ,valency

The combining capacity of an atom is known as its valency a bond of 2 .electrons

number found on the element example Na =11,c=6

their electronic confrigugation must be 2,8,8..so on

So for Na=2,8,1( last is valence electrona)

so we need to keep in mind that athe electronic configuation MUST BE FILLED TO ATAIN STABility THE WAYS AR

1.sharing electron-mainly done in elements having valency 4( last shell )

2.lossingelectron-if their last shell is having less than 4 (1,2,3) then they can lose electron

3.gaining electron-if last shell is more then4 (5,6,7) then they gain electrons

NOW THE PART IS THAT -

=>IF ANY ELEMENT LOSE ANY ELECTRON

THEN THEY BECOME POSITIVE AS ELECTRON IS NEGATIVE LOSING THEM IT WILL BE POSITIVE(+)

=>IF ANY ELEMENT GAIN ELECTRON THEN IT MORE BECOMES NEGATIVE AND BECOME (-)

NOW COME TO Na

na confriguation 2,8,1

it easy for it to lose 1 electron than gaining 7 electronsso it loses 1 electron and become positive na+

Let take another eg -in cl they gain 1 electron so cl-

it also observed become 2+in mg asit lose 2 e

-> how much electrons they lose or gain that same same amout they become positive or negativeex al+3,p-³

hope this helps in detailed way

Mark me brainliest