Question

a neutral atom has the following electron configuration: he 2s²2p⁴. what is the chemical symbol for the atom? how many electrons does the atom have? how many 2s electrons are in the atom? 2

Explanation:

Step1: Analyze electron - configuration

The electron - configuration is [He]2s²2p⁴. Helium (He) has 2 electrons. The 2s² sub - shell has 2 electrons and the 2p⁴ sub - shell has 4 electrons.

Step2: Calculate total electrons

The total number of electrons is 2 (from He) + 2 (from 2s) + 4 (from 2p) = 8 electrons.

Step3: Identify the element

In a neutral atom, the number of electrons is equal to the atomic number. The element with atomic number 8 is oxygen, with the chemical symbol O.

Answer:

What is the chemical symbol for the atom? O
How many electrons does the atom have? 8
How many 2s electrons are in the atom? 2