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 number= number of protons = number of neutrons
(iv) Atomic number= number of protons = number of electrons

(i) and (ii)

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(i) and (iii)

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(ii) and (iii)

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(ii) and (iv)

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Solution

The correct option is D
(ii) and (iv)

The correct option is (D).
Explanation of the correct option:
Atomic Number: is the number of protons present in the nucleus of an atom.
(i) Since an atom is electrically neutral the number of electrons is always equal to the number of protons
(ii) Thus Atomic Number= Number of protons= number of electrons.
2. Mass Number: is the sum of a number of neutrons and protons present in the nucleus of an atom.
Mass Number = Number of protons + Number of neutrons
Hence (i) Mass Number = Number of protons + Number of neutrons and (iv) Atomic Number= Number of protons= number of electrons are true statements.

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Q. Question 6
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 number = number of protons = number of neutrons
(iv) Atomic number = number of protons = number of electrons

(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii) and (iii)
(d) (ii) and (iv)

Q. Identify the correct statements.
(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. Question 6
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 number = number of protons = number of neutrons
(iv) Atomic number = number of protons = number of electrons

(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii) and (iii)
(d) (ii) and (iv)

Which of the following statements is/ are correct about neutral elements?

(i) Atomic number = number of protons = number of electrons
(ii) Mass number = number of protons + number of neutrons
(iii) Atomic number = number of protons + number of electrons
(iv) Mass number = number of neutrons = number of electrons

Q. Complete the following table.

(i)

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

(ii)

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

(iii)

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

(iv)

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

(v)

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

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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 number= number of protons = number of neutrons(iv) Atomic number= number of protons = number of electrons

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 number= number of protons = number of neutrons
(iv) Atomic number= number of protons = number of electrons