Question

1. how many valence electrons are in the following element? a. f b. cl c. br d. i e. o f. s g. se h. te

Explanation:

Step1: Recall valence - electron rule

Elements in group 17 have 7 valence electrons, and elements in group 16 have 6 valence electrons.

Step2: Identify group of each element

F (Fluorine), Cl (Chlorine), Br (Bromine), and I (Iodine) are in group 17. O (Oxygen), S (Sulfur), Se (Selenium), and Te (Tellurium) are in group 16.

Step3: Determine number of valence electrons

a. F: 7
b. Cl: 7
c. Br: 7
d. I: 7
e. O: 6
f. S: 6
g. Se: 6
h. Te: 6

Answer:

a. 7
b. 7
c. 7
d. 7
e. 6
f. 6
g. 6
h. 6