Science Quiz #4.1

    3 Science - Chemistry

    Atoms and Molecules

  1. An atom is the smallest particle of matter
  2. Atoms can be seen only with the use of an electron microscope
  3. Hydrogen is the most abundant element in the universe
  4. Hydrogen is classified as a nonmetal in the periodic table
  5. A molecule is a group of two or more atoms bonded together

   1. Atoms are made up of ...
a) protons
b) electrons
c) neutrons
d) all of these

  2. An example of a sub-atomic particle
a) molecule
b) acid
c) electron
d) water

  3. The number of protons in an element gives us ...
a) atomic number
b) ph number
c) mass number
d) none or these

  4. The mass number of the carbon element
a) 8
b) 10
c) 14
d) 12

  5. Uncharged particles in an atom
a) protons
b) neutrons
c) electrons
d) ions

  6. When different elements combine chemically
a) compound
b) mixture
c) substance
d) gas

  7. Which compound is made up of carbon, oxygen and hydrogen ?
a) water
b) salt
c) sugar
d) mixture

  8. Polyatomic molecule ( 3 or more atoms)
a) oxygen
b) ozone
c) hydrogen
d) magnesium oxide

  9. The only stable atom without neutrons is ...
a) oxygen
b) helium
c) hydrogen
d) lithium

  10. How many atoms are there in five molecules of sulfuric acid (5 H2SO4) ...
a) 35
b) 30
c) 22
d) 14

The systematic study of the physical and natural world
Metals and non metals