Question

Which is related to the number of electrons in the outer main energy level of the elements fro the alkali metals to the halogens?

a. Group Number
b. Period number
c. Both a and b
d. None

Answer 1

The number of electrons in the outer main energy level of the elements from the alkali metals to the halogens is related to their group number.

Step-by-step explanation:

The number of electrons in the outer main energy level of the elements from the alkali metals to the halogens is related to their group number.

The group number represents the number of valence electrons an element has. Alkali metals, which are found in Group 1, have 1 valence electron, while halogens, found in Group 17, have 7 valence electrons. This pattern continues throughout the periodic table.