Question

what are valence electrons? electrons found in the outermost energy level. maximum number of valence electrons is eight (8). identify the element and number of valence electrons in each atom below: element name: valence electrons: 7 element name: valence electrons: 5

Explanation:

Step1: Recall valence - electron concept

Valence electrons are the electrons in the outermost energy level of an atom.

Step2: Analyze first atom

The first atom has 7 valence electrons. Elements with 7 valence electrons are in Group 17 (halogens) of the periodic table. Fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and tennessine (Ts) have 7 valence electrons. If we assume this is a common element, chlorine has an electron - configuration of 2,8,7 and is a halogen with 7 valence electrons.

Step3: Analyze second atom

The second atom has 5 valence electrons. Elements with 5 valence electrons are in Group 15 of the periodic table. Nitrogen (N) has an electron - configuration of 2,5 and is a common element in this group.

Answer:

For the atom with 7 valence electrons: Element Name: Chlorine;
For the atom with 5 valence electrons: Element Name: Nitrogen