Which of the following statements is false?
a. alpha and beta particles pose little or no hazard to human health.
b. cosmic rays are a form of natural background radiation.
c. all of these are correct.
d. washing contaminated skin can reduce radiation exposure.
e. street clothing protects the skin against alpha and beta particles.

answer:

a

explanation:

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

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