Question

1.
a.
C.
Choose the correct answer.
C.
What are elements made up of?
Similar atoms only
b. Different kinds of atoms
Any two kinds of atoms
d. Different molecules
2. Which of the following is electrically
neutral?
a. Electron
b. Proton
c. Neutron
d. None of these
3. Which of the following is a monoatomic
molecule?
a.
He
b. H
C. C12
d
4. What is the valency of helium?
1
b. 2
a.
C.
3
d. O
5. Which is of the following is a polyatomic
cation?
a. Mg2+
b. ОН-
+
C. Cl-
d. NH​

Answer 1

Answer:

1) different kind of atoms

2) Neutron

3) c12

4) 2

5)oh-