Question

what element does this orbital diagram represent?
na
ar
ne
k

Explanation:

Step1: Count electrons per orbital

1s: 2, 2s: 2, 2p: 6, 3s: 1, 3p: 6

Step2: Sum total electrons

$2 + 2 + 6 + 1 + 6 = 11$

Step3: Match to atomic number

An atom with 11 electrons has atomic number 11, which is sodium (Na).

Answer:

Na