AFNS — AFNS Chemistry
Mix
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#25 Radioactivity discovered by:
A) Becquerel
B) Dalton
C) Mendeleev
D) Pauling
Answer: A
#26 Alpha particle is:
A) He nucleus
B) Electron
C) Neutron
D) Proton only
Answer: A
#27 Beta minus decay:
A) Neutron to proton + electron
B) Proton to neutron
C) Alpha emission
D) Gamma only
Answer: A
#28 Half-life is time for:
A) Half nuclei decay
B) All decay
C) Double amount
D) No decay
Answer: A
#29 Carbon dating uses:
A) C-14
B) C-12 only
C) U-238 only
D) H-1
Answer: A
#30 Green chemistry aims:
A) Reduce hazardous waste
B) More waste
C) Only profit
D) Ban all chemicals
Answer: A
#31 Greenhouse gas example:
A) CO2
B) O2
C) N2
D) Ar
Answer: A
#32 Ozone layer blocks:
A) UV radiation
B) Visible light all
C) Radio waves
D) Sound
Answer: A
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