The number of protons in a lithium atom are .

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Solution

The correct option is A 3
Atomic number of lithium is 3. Atomic number is equal to the number of protons in the nucleus of an atom. Hence, the number of protons in a lithium atom is 3.

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Similar questions

Q. Bombardment of lithium with protons gives rise to the following reaction.

_{3} H^{7} +_{1} H^{1} \to 2 (_{2} {He}^{4}) + Q

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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

Atom A has a mass number 209 and atomic number 82.

Atom B has a mass number 209 and atomic number 83.

(i) How many protons atom A has ?

(ii) How many protons atom B has ?

(iii) Are atoms A and B isotopes of the same element ?

Q. Naturally occuring lithium consists of two isotopes whose atomic weights are 6.015 u and 7.016 u. The atomic weight of natural lithium is 6.491 u. The percentage by number of atoms of each isotpe in natural lithium is and respectively.

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The number of protons in a lithium atom are .

The correct option is A 3Atomic number of lithium is 3. Atomic number is equal to the number of protons in the nucleus of an atom. Hence, the number of protons in a lithium atom is 3.

The correct option is A 3
Atomic number of lithium is 3. Atomic number is equal to the number of protons in the nucleus of an atom. Hence, the number of protons in a lithium atom is 3.