Second Quarter Exam in Science-9

1. What happens to the energy of an electron as it goes farther from the nucleus?

• its energy increases

• its energy decreases

• Its energy becomes fixed

• Its energy does not change

2. An atom with 32 electrons has ______ energy levels.

• 1

• 2

• 3

• 4

3. How many sublevels are in L energy level?

• 1

• 2

• 3

• 4

4. How many atomic orbitals are in P sublevel?

• 1

• 2

• 3

• 4

5. How many electrons can the d orbital holds?

• 2

• 6

• 10

• 14

6. Which of the given atomic orbitals is of higher energy?

• 1s

• 2s

• 2p

• 3p

7. Ionic bonds are formed between:

• Two metals

• Two nonmetals

• Two nonreactive elements

• Metals and non-metals

8. In forming ionic bonds:

• Electrons are shared by two metals

• Electrons are transferred from non-metals to metals

• Electrons are accepted by metals from non-metals

• Electrons are released by metals and accepted by non-metals

9. A chemical bonding between the two atoms which shares a single pair of an electron is

• single bond

• triple bond

• double bond

• all of these

10. What kind of particle is produced after covalent bonding?

• atom

• molecule

• ion

• electron