On adding the number of protons and the number of neutrons in the nucleus of an atom, Sam got the ___ of the considered element.

atomic number

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mass number

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number of protons

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number of nucleons

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Solution

The correct options are
B
mass number

D
number of nucleons

-Atomic number(Z): the number of protons in the nucleus of an atom. For a neutral atom, Z= number of protons= number of electrons.

-Mass number(A): the sum of the number of protons and the number of neutrons in the nucleus of an atom. ie., the number of nucleons of the atom.

Suggest Corrections

Similar questions

Consider the following statements:

1. The number of protons in the nucleus of an atom of a given element is called the atomic number of that element.

2. Mass number of an atom is defined as the sum of number of protons and neutrons present in the nucleus of an atom.

3. Atoms of an element that have the same atomic number (Z) but different mass number (A) are called isotopes.

Which of the above statements is incorrectly stated?

Q. Which of the following are true for an element?
(i) Atomic number = number of protons + number of electrons
(ii) Mass number = number of protons + number of neutrons
(iii) Atomic mass = number of protons = number of neutrons
(iv) Atomic number = number of protons = number of electrons

Q. How many electrons, protons and neutrons are there in a nucleus of atomic number

11

and mass number

24

?
(i) number of electron

=

________.
(ii) number of protons

=

________.
(iii) number of neutrons

=

_______.

The nucleus of an atom has 5 protons and 6 neutrons. What would be the (a) atomic number, (b) mass number, (c) the number of electrons, and (d) the number of valence electrons, per atom of this element?

What is mass number of an element? How is the mass number related to the protons and neutrons present in the nucleus of an atom?

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