Question

question 51 (2 points)
how many electrons are there in the highest occupied energy level of atoms in group 5a elements?
blank 1:

Explanation:

Step1: Recall group number and valence electrons relationship

In the periodic table, for main - group elements (Groups 1A - 8A), the group number (for Groups 1A - 2A, it is straightforward; for Groups 3A - 8A, the group number gives the number of valence electrons). Group 5A elements are main - group elements.

Step2: Determine the number of valence electrons

Since Group 5A is a main - group, the number of electrons in the highest - occupied energy level (valence electrons) is equal to the group number (when considering Groups 1A - 2A as 1 and 2, and Groups 3A - 8A as 3 - 8). For Group 5A, the number of electrons in the highest - occupied energy level is 5.

Answer:

5