Question

Element X is a neutral element and has 39 protons. What element is it and how many electrons does it have? (Use the periodic table)
A.
Argon – 18
B.
Yttrium – 39
C.
Platinum – 78
D.
There is not enough information to determine.
Points Possible:2.00
2.
Using the periodic table, which of the following is an isotope?
A.
C – 12
B.
Zn – 68
C.
Tb – 159
D.
Cs - 133
Points Possible:2.00
3.
Cerium has 58 neutrons and 58 protons.
A.
True
B.
False

Answer 1

I think...A,,,D,,,B

Answer 2

I meant A