Question

Answer the following :-

1) name the three subatomic particles of an atom .
2) an atom of an element has 5 electrons in L shell :
a) what is the atomic number of the element ?
b) state its valency .
c) identify the element and write its name

Answer 1

1. electron, proton and neutrons

2. a. 7( cause there has to be 2 elstrins in the K shell and it is given that there are 5 electrons in the L shell. therefore 2+ 5 =7 electrons)

B. valence will be 3.(for competing octet needs 8-5=3 electrons)

c.the element is nitrogen(N2)



hope it helps u...

Answer 2

HERE IS YOUR ANSWER

1) electron , proton and nucleus

2) a) 7
b) 3 or 5
c) nitrogen