Question

plz answer this its urgent exam​

Answer 1

Answer:

No of electrons protons and neutrons in chemical species

A number of electrons, protons, and neutrons in chemical species A, B, C, and D is given below.

Element Electrons Protons

A 2 3

B 10 9

C 8 8

D 8 8

Answer 2

Explanation:

mass number for A is 3+4= 7

mass number for B is 9+8=17

atomic number for B is 9

valency for C is 2

element D because they have a different neutrons.