AFNS — AFNS Chemistry

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#25

Radioactivity discovered by:

A) Becquerel

B) Dalton

C) Mendeleev

D) Pauling

Answer:   A
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#26

Alpha particle is:

A) He nucleus

B) Electron

C) Neutron

D) Proton only

Answer:   A
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#27

Beta minus decay:

A) Neutron to proton + electron

B) Proton to neutron

C) Alpha emission

D) Gamma only

Answer:   A
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#28

Half-life is time for:

A) Half nuclei decay

B) All decay

C) Double amount

D) No decay

Answer:   A
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#29

Carbon dating uses:

A) C-14

B) C-12 only

C) U-238 only

D) H-1

Answer:   A
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#30

Green chemistry aims:

A) Reduce hazardous waste

B) More waste

C) Only profit

D) Ban all chemicals

Answer:   A
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#31

Greenhouse gas example:

A) CO2

B) O2

C) N2

D) Ar

Answer:   A
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#32

Ozone layer blocks:

A) UV radiation

B) Visible light all

C) Radio waves

D) Sound

Answer:   A
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