Question

1. Chemistry is the study of
éct option.
.
a) Energy
b) matter
c) Earth
2. An atom is electrically
a) Positive
b) Negative
c) Neutral
3. Which of the following sub atomic particles is negatively charge
a) Electron
b) Proton
c) Neutron
4. The formula of water is
b) CaCO3
c) NaCl
5. The symbol of sodium element is
b) Na
c) Se
6. Which of the following is a molecule?
c) H2O
7. The sum of number of protons and neutrons in an atom is called
b) Atomic mass
c) Atomic mass unit
8. The bond which is formed by complete transfer of electrons is calle
b) Covalent bond
c) Coordinate covalent bond
a) H2O
a) s
b) Ca
a) Co
a) Atomic number
c) Cations
a) Ionic bond
9. Positively charged particles are called
a) Atoms
b) Anions
10. Mg2+ means that Magnesium has lost two
b) Protons
c) Neutrons
a) Electrons​

Answer 1

Explanation:

If you are facing the rising sun, you will be facing east. South lies to the right if one faces east. Therefore, to your right will be South.

Answer 2

Answer:

1) matter

2)neutral

3)electrons

4)h2O

5)Na

6)H2O

7)atomic mass

8)ionic bond

9)anions

10)electrons

Explanation: