Which statement accurately describes the atoms of a specific element?

A) An indium‚ In‚ atom contains 115 protons inside the nucleus and 49 neutrons outside the nucleus.

B) A scandium‚ Sc‚ atom contains 45 electrons outside the nucleus and 21 neutrons inside the nucleus.

C) An aluminum‚ Al‚ atom contains 27 electrons and 27 protons inside the nucleus.

D) A zinc‚ Zn‚ atom contains 30 protons inside the nucleus and 30 electrons outside the nucleus.

Answer: The correct answer is Option D.

Explanation:

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

Z = Atomic number = Number of electrons = Number of protons

Mass number is defined as the sum of number of protons and number of neutrons present in an atom. It is represented as A.

A = Mass number = Number of protons + Number of neutrons

Number of neutrons = Mass number - Atomic number

For the given options:

Option A:

Indium is the 49th element of the periodic table having mass number 115.

So, Number of protons = Number of electrons = 49

Number of neutrons = 115 - 49 = 66

Hence, this is not correctly described.

Option B:

Scandium is the 21st element of the periodic table having mass number 45

So, Number of protons = Number of electrons = 21

Number of neutrons = 45 - 21 = 24

Hence, this is not correctly described.

Option C:

Aluminium is the 13th element of the periodic table having mass number 27

So, Number of protons = Number of electrons = 13

Number of neutrons = 27 - 13 = 14

Hence, this is not correctly described.

Option D:

Zinc is the 30th element of the periodic table.

So, Number of protons = Number of electrons = 30

This atom has 30 protons inside the nucleus and 30 electrons outside the nucleus.

Hence, this is correctly described.

Thus, the correct answer is Option D.

Answer: the correct answer is 100% B. scandium‚ Sc‚ atom contains 45 electrons outside the nucleus and 21 neutrons inside the nucleus. just took the test and got it right