Question

The ion of an element has 3 positive charges.Mass number of the atom is 27 and the number of neutrons is 14. What is the number of electrons in the ion? (a) 13 (b) 10 (c) 14 (d) 16 ​

Answer 1

Answer:

Mass number of the a. Solution : Given that, charge = + 3, mass number = 27 and number of neutrons = 14 <br> Number of protons = atomic number <br> Atomic number = mass number - number of neutrons = 27-14 = 13 <br> This is the atomic number of aluminium. <br> Therefore, this element is aluminium.

Hope my answer is clear

Answer 2

Explanation:

mass number = no. of protons + no. of neutrons

27. = no. of protons + 14

no. of protons = 27 - 14

= 13

we know that

no. of protons = no. of electrons

so the number of electrons will be 13