Question

1. using the table below, determine how many valence electrons are in an atom of neon.

electron configurations and dot structures

element	atomic number	electron configuration
beryllium	4	1s²2s²
boron	5	1s²2s²2p¹
carbon	6	1s²2s²2p²
nitrogen	7	1s²2s²2p³
oxygen	8	1s²2s²2p⁴
fluorine	9	1s²2s²2p⁵
neon	10	1s²2s²2p⁶

Explanation:

Step1: Identify neon's electron configuration

Neon has an electron - configuration of $1s^{2}2s^{2}2p^{6}$.

Step2: Count the number of electrons

Sum the exponents of the electron - configuration. $2 + 2+6=10$.

Answer:

10