Four elements P; Q; R and S have atomic numbers of 4; 10; 12; and 14 respectively. Which of these elements is a noble gas?

By: |Published on: Mar 19|Categories: Chemistry JAMB| 0 comments

Four elements P; Q; R and S have atomic numbers of 4, 10, 12, and 14 respectively. Which of these elements is a noble gas?

A. P
B. Q
C. R
D. S

Correct Answer:

Option B = Q

Explanation

They are the most stable due to having the maximum number of valence electrons their outer shell can hold. Therefore, they rarely react with other elements since they are already stable.

Users Also Read These:

SEE ALSO  How many neutrons are present in atom with mass number and atomic number 37 and 17 respectively?

Copyright warnings! Do not copy.