Question

An Element “X” has 13protons, 13electrons and 14 neutrons.

Answer the following questions:

a)What is its atomic number of „X‟?

b) Identify the element.

c) What is its valency? What is the number of valence electrons is “x”?

d) What is the type of ion formed by “X” ? Why?

e)Name the scientists who discovered electrons and protons

Answer 1

a) The atomic number of X is 13

b) The element is aluminium 

c) its valency is 3. valence electrons= 3

e) electron was discovered by  j.j.thomson
    proton was discovered by goldstein

Answer 2

a)The atomic number of "X" is 13.

b)The element is Aluminium having atomic number 13.

c)The valency of Aluminium is 3.T he valence electrons is 3.

d)The ion is electropositive trivalent radicals or ions.

e)Electron is discovered by JJThomson and Proton is discovered by Goldstein.