Question

The ion 27al3+ contains which combination of protons, neutrons, and electrons?

Answer 1

Al atom has 13 protons, 13 electrons.
Mass number = number protons + number neutrons
27 = 13 +  number neutrons,
number neutrons =27 - 13 = 14 neutrons .
 Ion Al³⁺, lost 3 electrons.
So, in Al³⁺, 13-3=10 electrons.

So, ion Al³⁺ has 13 protons,14 neutrons, 10 electrons.

Answer 2

Answer: This ion has 13 protons, 14 neutrons and 10 electrons.

Explanation:

An ion is formed when an atom looses or gains electron.

• When an atom looses electrons, it will form a positive ion known as cation.
• When an atom gains electrons, it will form a negative ion known as anion.

Atomic number is defined as the number of protons or electrons that are present in a neutral atom.

Atomic number = number of protons = number of electrons

Atomic mass is defined as the sum of number of protons and neutrons that are present in an atom.

Atomic mass = Number of protons + Number of neutrons

For the given representation of ion, which is:  $^{27}_{13}\textrm{Al}^{3+}$

We are given:

Atomic number = Number of protons = 13

Number of electrons = Number of protons - charge = 13 - (+3) = 10

Mass number = 27

Number of neutrons = Atomic number - Mass number = 27 - 13 = 14

Hence, this ion has 13 protons, 14 neutrons and 10 electrons.