Chapter 18 Atomic and Nuclear Physics-4

Chapter 18 Atomic and Nuclear Physics-4

1. What is the formula for mass of an atom?

a) Mass of an atom = Mass of protons - Mass of neutrons
b) Mass of an atom = Mass of protons + Mass of electrons
c) Mass of an atom = Mass of protons + Mass of neutrons
d) Mass of an atom = Mass of electrons + Mass of neutrons

2. What is the symbol for representing an atom?

a) z^A X
b) A^A X
c) A^Z X
d) Z^Z X

3. Find the number of protons in the nuclide defined by 6¹³ X?

a) 7
b) 19
c) 6
d) 13

4. One of the isotopes of uranium is ²³⁸ ₉₂ U. The number of neutrons in this isotope is?

a) 238
b) 146
c) 92
d) 330

5. One of the isotopes of uranium is ²³⁸ ₉₂ U. The number of protons in this isotope is?

a) 238
b) 92
c) 146
d) 330

6. What are atoms of an element which have same number of protons but different number of neutrons in their nuclei called?

a) Nucleons
b) Cosmic elements
c) Isotopes
d) Radioactive atoms

7. Isotopes are atoms of same element with different………….?

a) Number of electrons
b) Atomic mass
c) Number of protons
d) Atomic number

8. Isotopes are atoms of same element with different………….?

a) Number of neutrons
b) Number of electrons
c) Atomic number
d) Number of protons

9. Isotopes are atoms of same element with same………….?

a) Number of neutrons
b) Atomic mass
c) Atomic number
d) Number of electrons

10. Find the number of neutrons in the nuclide defined by6¹³ X? value="a" id="10aq" onClick="Touch(this,10,id,1,0)">a) 13
b) 7
c) 19
d) 6

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