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Isobars and Isotopes

What is meant...

Question

What is meant by ”atomic number of an element''?

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Solution

Atomic number is the number of protons in the nucleus of an atom.

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Similar questions

(a) What is meant by (i) atomic number, and (ii) mass number, of an element? Explain with the help of an example.

(b) What is the relation between the atomic number and mass number of an element?

(c) If an element M has mass number 24 and atomic number 12, how many neutrons does its atom contain?

Answer the following questions.

(a) What is the difference between the models of the atom proposed by Thomson and by Rutherford?

(b) What is the characteristic property of the element hydrogen?

(c) What is meant by valency?

(d) What is meant by atomic mass number?

(e) Name the fundamental particles in an atom.

Q. Answer the following
A. Whati is the difference in the atomic models of Thomson and Rutherford ?
B. What is meant by valency of an element ? what is the relationship between the number of valence electron and valency ?
C. What is meant by atomic mass number ? Explain how the atomic number and mass number of carbon are 6 and 12 respectively.
D. what is meant by subatomic particle ? give brief information of three subatomic particles with refrence to electrical charge, mass and location.

What is meant by atomicity ? Name a diatomic element.

(a) Define atomic mass unit. What is its symbol ?

(b) Define atomic mass of an element.

(c) What is meant by saying that 'the atomic mass of oxygen is 16' ?

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Isobars and Isotopes

Standard XII Chemistry

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