Chemistry 9 Chapter 3Periodic Table and Periodicity of Properties - 9

Chemistry 9 Chapter 3
Periodic Table and Periodicity of Properties - 9

1. How many elements are present in the 2nd period?

a) 8
b) 7
c) 9
d) 6

2. Ne has atomic number 10. How many electrons are present in its L shell?

a) 10
b) 6
c) 2
d) 8

3. Chemical properties of an element depends upon?

a) Size of atoms
b) None of these
c) Shape of atoms
d) Valence shell electronic configuration

4. The reduction in force of attraction between nucleus and the
valence electrons present in the inner sub-shells is called as?

a) Electronegativity
b) Shielding effect
c) Force of gravity
d) Ionization energy

5. Moving from top to bottom in a group, the number of electronic shells?

a) Increases
b) Remains the same
c) Decreases

6. Moving from left to right in a period, the number of electrons in the inner shells?

a) Decreases
b) Increases
c) Remains constant

7. What happened to the shielding effect when we move from top to bottom in a group?

a) Remains constant
b) Increases
c) Decreases

8. Moving from left to right in a period, the shielding effect?

a) Decreases
b) Increases
c) Remainst constant

9. Which one of the following is correct?

a) Be have greater shielding effect than Mg
b) Mg have greater shielding effect than Be
c) None of these
d) C have greater shielding effect than Si

10. Which one of the following properties of an atom is affected by the electronic configuration?

a) Atomic size
b) All of these
c) Electron affinity
d) Electronegativity

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