10 chemistry questions and i'll give you 20 points! please help! just check my answers

6. Which of the following will stop beta particles?
paper << my answer

air

skin

aluminum foil

7. Which of the following symbols represents a half life?

T1/2 << my answer

Ea

alpha

beta

8. For the given transmutation, X is which of the following? 96242Cm + X 98245Cf + 01n
(I didn't get this one)
24He

10e

+10e

gamma



9. Which of the following requires a critical mass?

leptons

beta emission

gamma emission

Fission << my answer



10. Which of the following is a nucleon?

neutron

electron

up quarks

down quarks



11. Which of the following reactions describes a beta emission?

94239Pu + 24He 96242Cm + 01n

2659Fe 2759Co + -10e << my answer

54118Xe 53118I + +10e

88226Ra 86222Rn + 24He



12. If 0.78% of a radioactive substance remains, then how many half-lives have passed?

7<< my answer

6

4

3



13. What is the upper limit of Z for an element to be a naturally occurring radioisotope?

68

88

92 << my answer

102



14. Which of the following reactions would you find in a radioisotope thermal generator?

11H + 12H 23He

12H + 12H 23He + 01n

92235U + 01n 56141Ba + 3692Kr + 301n

94238Pu 92234U + 24He2+ << my answer



15. Which of the following has a -⅓ charge?

electron

down quark << my answer

up quark

hadron

Hey there,
This is actually physics but I can help anyway :)

6: Is correct
7:Correct
8: 2 4 He if you add up the mass and atomic numbers :)
9: Correct
10: Neutron. Nucleons are in the nucleus. quarks make nucleons and electrons aren't part of the nucleus.
11:Correct
12: Correct
13:Correct
14: Correct
15: Correct
If you need anymore help just message me. :)