Four students were asked to identify the number of valence electrons in an Argon (Ar) atom to help them determine the reactivity of the atom. Students were referred to group 18 to help them determine this. Student

# Of Valence Electrons in an Argon atom

Reactivity of an Argon atom

Student 1

1 v. e.

Reactive

Student 2

3 v. e.

Unreactive

Student 3

5 v. e.

Reactive

Student 4

8 v. e.

Unreactive

Which student identified the number of valence electrons and reactivity of Argon (Ar) correctly?

Refer to the Periodic Table

A.
Student 1

B.
Student 2

C.
Student 3

D.
Student 4