I'LL GIVE 30 POINTS AND A BRAINIEST:)

Question 1 - A and C

Question 2 - B and C

Question 3 - A and D

Question 4 - A and B

Question 5 - A and C

Explanation:

BRAINLIEST PLEASE

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.

answerspecific gravity;