1. The Alpha particle is a helium nucleus, is positively charged & would barely penetrate a piece of paper.<span />
Answer:
b,d
Explanation:
An ion is an atom with a difference in the amount of protons and elektrons.
55.8 grams Would be the answer
D is the answer. A, B,C are absurd. Doing a little word right there.
Answer:
0.011 moles
Explanation:
There are about 6.02*10^23 atoms in a mole, so in the given sample, there are

which is about 0.011 moles.