Question

how many electrons does this atom have? 1s²2s²2p⁶3s²3p¹
20
10
13
18

Explanation:

Step1: Calculate electrons in each orbital

For \(1s^2\), electrons = \(2\).
For \(2s^2\), electrons = \(2\).
For \(2p^6\), electrons = \(6\).
For \(3s^2\), electrons = \(2\).
For \(3p^1\), electrons = \(1\).

Step2: Sum up all electrons

Total electrons \(=2 + 2+6 + 2+1\)
\(=13\)

Answer:

13