During alpha decay, a radioactive atom releases an alpha particle that is equivalent to the nucleus of a helium atom. So, the new atom that is formed should have protons than the original atom.
A. two more
B. two fewer
C. four fewer
D. four more

B. two fewer

Explanation:

Helium has two protons so two protons are released from that nucleus.

car a and b are moving in opposite directions

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find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2