One atom of Helium has 2 electrons, 2 protons and 2 neutrons. Calculate the atomic number and mass number of Helium.

Atomic number = 2

Mass number = 4

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Atomic number = 4

Mass number = 6

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Atomic number = 4

Mass number = 2

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Atomic number = 2

Mass number = 6

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Solution

The correct option is A
Atomic number = 2

Mass number = 4

Atomic number is the number of protons in the atom.
Mass number is the sum of protons and neutrons in the atom.

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Similar questions

Given the element helium has mass number 4 and 2 electrons.Find the atomic number, mass number, number of protons, number of neutrons and electronic configuration of the same.

An atom has 4 protons and 5 neutrons with electronic configuration 2, 2. Find its mass number.

Q. Which of the following statement is always correct?

(a) an atom has equal number of electrons and protons

(b) an atom has equal number of electrons and neutrons

(d) an atom has equal number of electrons, protons and neutrons

Helium atom has an atomic mass of 4u and has two protons in its nucleus. How many neutrons does it have?

Q. Helium has a mass number

4

and the atomic number

2

. Calculate the nuclear binding energy per nucleon. (mass of neutron

= 1.00893 a m u

and proton

= 1.00814 a m u

H e = 4.0039 a m u

and mass of electron is negligible).

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One atom of Helium has 2 electrons, 2 protons and 2 neutrons. Calculate the atomic number and mass number of Helium. ​

The correct option is A Atomic number = 2​ Mass number = 4​ Atomic number is the number of protons in the atom. Mass number is the sum of protons and neutrons in the atom.

One atom of Helium has 2 electrons, 2 protons and 2 neutrons. Calculate the atomic number and mass number of Helium.

The correct option is A
Atomic number = 2

Mass number = 4

Atomic number is the number of protons in the atom.
Mass number is the sum of protons and neutrons in the atom.