Question

an atom with atomic number 12 has number of neutrons 12 in it.calculate the mass number and number of protons​

Answer 1

$\Huge{\underline{\underline{\blue{\mathfrak{Question :}}}}}$

An atom with atomic number 12 has number of neutrons 12 in it. Calculate the mass number and number of protons.

$\Huge{\underline{\underline{\blue{\mathfrak{Answer :}}}}}$

• Atomic Number of element = 12
• Number of neutrons = 12

We have to Find Mass and Number of protons

Remember :-

${\boxed{\red{\sf{Mass \: = \: Number \: of \: Electrons \: + \: Number \: of \: Neutrons}}}}$

And also,

${\boxed{\red{\sf{Atomic \: No. \: = \: No. \: of \: electrons \: = \: No. \: of \: Protons }}}}$

From above we know,

Atomic Number = No. of electrons = No. of Protons

Atomic Number = 12

No. of elections = 12

No. of Protons = 12

And Mass = No. of electrons + No. of Neutrons

→ Mass = 12 + 12

→ Mass = 24

The Atoms is Magnesium

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$\LARGE{\underline{\underline{\sf{Additional \: Information }}}}$

Properties of Magnesium :-

• It is denoted by Mg.
• It belongs to S-block
• It is an Alkaline earth metal.
• It is a element of Group - 2
• It's electronic configuration is 2,8,2
• It belongs to 3rd Period.
• It's valency is +2
• It have Atomic Weight 24 u, Atomic Number 12