Question

15) Identify the element and write down the mass number and atomic number.
27
13 X.​

Answer 1

Answer:

element - Cobalt

mass number -59

atomic number -27

Answer 2

Answer:

Atomic number -Z=13

Element is aluminum

mass number is 27

Element is presented by 27AI 13

Number of protons =13

Mass number = Number of protons +

Number of neutrons

So, number of neutrons =Mass number - number of protons

=27-13

14 neutrons

electronic configuration :

1s^1 2s^2 2p^6 3s^2 3p^1

Electrons arranged in Shells are shown in attached :