The atomic number of an element is determined by:

the number of electrons in one atom

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the number of neutrons in one atom

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the valency of the element

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the number of protons in one atom

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Solution

The correct option is D the number of protons in one atom
Atomic number is the number of protons in the nucleus of an atom and also the total positive charge in the atomic nucleus.

Hence, option $D$ is correct.

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Similar questions

Q. Atomic number of an element refers to the number of protons present in an atom of that element. If atomic number of Carbon (C) is 6, then find the number of protons and electrons in one atom of carbon.

Q. if the atom of an element has atomic number 11 and mass number 23 find the number of protons electrons and neutrons in the atom

Fill in the following blanks in respect of an atom of an element :

Number of protons	Number of neutrons	Mass number	Atomic number	Number of electron	Valency
11	12	.............	.............	.............	.............

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

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?

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The atomic number of an element is determined by:

The correct option is D the number of protons in one atomAtomic number is the number of protons in the nucleus of an atom and also the total positive charge in the atomic nucleus.Hence, option D is correct.

The correct option is D the number of protons in one atom
Atomic number is the number of protons in the nucleus of an atom and also the total positive charge in the atomic nucleus.

Hence, option $D$ is correct.