Atoms and molecules easy

Atoms and Molecules Quiz (Easy)

1. The smallest particle of an element that retains all the properties of that element is called:

a) A molecule b) An atom c) A compound d) An ion

2. The number of protons in the nucleus of an atom is called:

a) Atomic number b) Mass number c) Electron number d) Neutron number

3. The subatomic particle with a positive charge is the:

a) Neutron b) Proton c) Electron d) Nucleus

4. The subatomic particle with a negative charge is the:

a) Neutron b) Proton c) Electron d) Nucleus

5. The total number of protons and neutrons in the nucleus of an atom is called:

a) Atomic number b) Mass number c) Electron number d) Atomic mass

6. A group of atoms that are chemically bonded together is called:

a) A molecule b) An ion c) An element d) A compound

7. The chemical formula H2O represents:

a) Two hydrogen atoms and one oxygen atom b) Two oxygen atoms and one hydrogen atom c) Two hydrogen atoms and two oxygen atoms d) One hydrogen atom and two oxygen atoms

8. The chemical formula for methane is:

a) CH b) CH3 c) CH4 d) C4H10

9. The chemical formula CO2 represents:

a) One carbon atom and two oxygen atoms b) One oxygen atom and two carbon atoms c) One carbon atom and one oxygen atom d) Two carbon atoms and one oxygen atom

10. The mass of an atom is mainly concentrated in its:

a) Nucleus b) Protons c) Electrons d) Neutrons