What is the name for the number of protons in an atom?

Atomic identity

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Atomic mass

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Atomic weight

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Atomic number

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Solution

The correct option is D Atomic number
Atomic number is the number of protons in the nucleus of an atom, which is characteristic of a chemical element and determines its place in the periodic table.

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Atomic number	Mass number	Number of neutrons	Number of protons	Number of electrons	Name of the Atomic species
9	-	10	-	-	-

Atomic number	Mass number	Number of neutrons	Number of protons	Number of electrons	Name of the Atomic species
16	32	-	-	-	Sulphur

Atomic number	Mass number	Number of neutrons	Number of protons	Number of electrons	Name of the Atomic species
16	32	-	-	-	Sulphur

Atomic number	Mass number	Number of neutrons	Number of protons	Number of electrons	Name of the Atomic species
-	2	-	1	-	-

Atomic number	Mass number	Number of neutrons	Number of protons	Number of electrons	Name of the Atomic species
-	1	0	1	1	-

An atom of an element has two electrons in the M shell. What is the (a) atomic number (b) number of protons in 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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