Chemistry - 9 Chapter - 4Periodicity of Elements and Periodic TableTest - 27

Chemistry - 9 Chapter - 4
Periodicity of Elements and Periodic Table
Test - 27

1. What is an ion?

a) Ion is an atom or group of atoms that has acquired an electric charge by losing or gaining one or more electrons
b) Ion is an atom or group of atoms that has acquired an electric charge by losing one or more electrons

2. What is ionization energy?
Ionization energy means the least energy required to expel electron from the outer most shell of a gaseous atom to convert it into a positive ion. Ionization energy decreases gradually from top to bottom in a group and increases gradually from --------------- in a period.

a) left to right
b) right to left

3. What is ionization?

a) The process in which an atom or molecule loses or gains electrons in any shell and becomes negatively or positively charged
b) The process in which an atom or molecule loses or gains electrons in outermost shell and becomes negatively or Positively charged

4. What is second ionization energy?

a) Energy required to remove second electron from a negaitive ion
b) Energy required to remove second electron from a positive ion

5. When an electron is gained by an atom the energy is ____?

a) Release
b) No effect
c) Gained

6. Why first ionization energy gradually increases across a period.

a) Because in any period the atomic size gradually decreases from left to right.
b) Because in any period the atomic size gradually decreases from right to left.

7. All 109 Elements occur naturally.

a) True
b) False

8. All actinides are non-radioactive metal?

a) False
b) True

9. All Lanthanides do not resemble each other?

a) True
b) False

10. A graph between atomic volume and atomic mass was plotted by Newland.

a) False
b) True

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