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April 26, 2015

Homework Help: Chemistry please check

Posted by Mary on Friday, February 15, 2008 at 11:35pm.

1. All of the naturally occurring radioactive decay series end when the radioactive elements have decayed to

bismuth (Bi)
hydrogen (H)
lead (Pb)
uranium (U)

answer: Uranium (U)

2. This type of radiation can easily pass through a human.

gamma
ultra-violet
beta
alpha

answer: gamma

3. This type of radiation is really the nucleus of a helium atom.

alpha
gamma
beta
proton

answer: alpha

4. As the size of nuclei increases, the ratio of neutrons to protons in the band of stability increases to

3 to 1
1.25 to 1
2 to 1
1.5 to 1

answer: 1.5 to 1

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