Grade 4 & 5 Chemistry: Free Trial*

G. 10 & 11

Chemistry

F. 4 & 5

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G. 10 & 11 / F. 4 & 5

Chemistry: Free Trial*

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1 / 10

1. Pick the correct combination for the charges of subatomic particles.

A. Proton $+ve$, Neutron $-ve$, and Electron 0

B. Proton 0. Neutron $+ve$, and Electron $-ve$

C. Proton $+ve$, Neutron 0, and Electron $-ve$

D. Proton 0, Neutron 0, and Electron $-ve$

2 / 10

2. The atomic number of an element tells us...

A. the number of electrons orbiting the nucleus

B. the number of neutrons in the nucleus

C. the number of electrons in the nucleus

D. the number of protons orbiting the nucleus

3 / 10

3. Choose the correctly balanced chemical equation from the list.

A. $2H_{2}SO_{4} + Pb(OH)_{4} \longrightarrow Pb(SO_{4})_{2} + H_{2}O$

B. $2H_{2}SO_{4} + Pb(OH)_{4} \longrightarrow PbSO_{4} + 4H_{2}O$

C. $H_{2}SO_{4} + Pb(OH)_{4} \longrightarrow Pb(SO_{4})_{2} + 4H_{2}O$

D. $2H_{2}SO_{4} + Pb(OH)_{4} \longrightarrow Pb(SO_{4})_{2} + 4H_{2}O$

4 / 10

4. What is the electron configuration of the element lithium?

A. 2:8

B. 2:2

C. 2:8:1

D. 2:1

5 / 10

5. What type of bonding has 'free' electrons?

A. Hydrogen

B. Covalent

C. Metallic

D. Ionic

6 / 10

6. What does malleable mean?

A. Can be bent or hammered into shape

B. Is easily shattered

C. Is shiny

D. Can be stretched into wires

7 / 10

7. Metals have...

A. high melting points because they have weak bonds

B. low melting points because they have weak bonds

C. high melting points because they have strong bonds

D. low melting points because they have strong bonds

8 / 10

8. Why do metals conduct electricity?

A. The negative electrons are free to move

B. All the constituent parts can move through the metal

C. The positive protons are free to move

D. The positive metal ions are free to move

9 / 10

9. Metals are malleable because...

A. a large amount of energy is required to slide one layer of electrons over another

B. a huge amount of energy is required to slide one layer of ions over another layer

C. little energy is required to slide one layer of electrons over another

D. little energy is required to slide one layer of ions over another layer

10 / 10

10. How many covalent bonds can nitrogen form?

A. 3

B. 4

C. 2

D. 1

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