Chapter 3, Problem 8STP

Interpretation Introduction

Interpretation: The symbol of nonmetal in the formula $Ca{X}_2$ needs to be determined.

Concept Introduction: Every matter is made of chemicals; the importance of chemistry is that it's the study of everything. Chemistry is all about how something interacts to affect the structure, composition, as well as knowing properties of substances.

Answer to Problem 8STP

Correct answer: The correct is option (D).

Explanation of Solution

Reason for correct option:

The noble gases don’t react with anything. They are neither metalloid nor a metal. Noble gases are also called ‘inert gas’. They are colorless and odorless.

Neon is a noble gas. The atomic number of Neon is 10. It symbolizes as Ne. It is neither metalloid nor a metal i.e. it is a non-metal chemical element. Neon has 2,8 electron per shell. It has 10 neutrons and 10 protons. So, the correct option is (D).

Conclusion

Reasons for incorrect options:

Option A: Atomic number of neon is $10$ . So, this is an incorrect option.

Option B: Atomic number of neon is $10$ . So, this is an incorrect option.

Option C: Atomic number of neon is $10$ . So, this is an incorrect option.