Question

use the elements of the periodic table to help you identify the number of valence for each of these elements 1,2,3,4,5,6,7, or 8carbon (C) 1Chlorine (Cl) 2Neon (Ne) 3Calcium (Ca) 4Oxygen (O) 5 6 7 8

Answer 1

Step-by-step explanation:

Here, we want to get the valence electron number for each of the listed elements

The number of valence electrons is used to put elements into groups

Thus, an element will have 1 valence electron if it belongs to group 1

Now, let us get the valence electrons for each of the listed elements

Carbon C has 6 valence electrons

Chlorine Cl has 7 valence electrons

Neon Ne has 8 valence electrons

Calcium Ca has 2 valence electrons

Oxygen O has 6 valence electrons

Kindly note that we do not count the d-block when checking for the number of valence electrons. After the second group, we skip the next 10 (the transition metals) and count the next group, starting from Boron as 3, in that sequence