Question

The number of subatomic particles present in the elements A to F are as follows:

Atoms of elements No of protons No of neutrons No of electrons
A 8 10 8
B 11. 12. 11
C 17. (X). 17
D 17. 20. 17
E 18. 22. 18
F (Y). 20. 19
G 20. 20. 20

Analyze the given data and answer the following:
a. If the mass number of C is 35, what is the value of x?
b. If F is a neutral atom, what is the value of y?
c. Which two elements represent a pair of isotopes?
d. Which two elements represent a pair of isobars?
e. How many sub-atomic particles make up the nucleus of A?
f. Identify the noble gas in the given table.
g. Write the electronic configuration of F.
h. What is the number of valence electrons in C?
i. What is the valency of F?

Answer 1

Explanation:

x=18................