Science Quiz #4.3

    3 Science - Chemistry

    Elements and the Periodic Table II

  1. An element is a pure substance
  2. Elements cannot be broken down into simpler substances chemically
  3. Atoms have no net electrical charge
  4. Hydrogen has an atomic number of 1 and a mass number of 1
  5. Valency shell is the outermost energy level

   1. Oxygen has a mass number of 16. How many electrons are in the second shell?
a) 2
b) 4
c) 6
d) 8

  2. What is the electron configuration of Nitrogen (N)?
a) 2.5
b) 5.2
c) 0.7
d) 7.7

  3. How many electrons are in the valency shell of Sodium (Na) ?
a) 8
b) 7
c) 2
d) 1

  4. The heaviest naturally occurring element (atomic number : 92) is
a) lead
b) uranium
c) diamond
d) gold

  5. These two elements are yellow solids at room temperature
a) copper and tin
b) silver and gold
c) potassium and iron
d) sulfur and gold

  6. Gold is written as ...... in the periodic table
a) Au
b) Si
c) G
d) Ag

  7. Combustion needs fuel, heat and .......
a) wood
b) oxygen
c) hydrogen
d) water

  8. A slightly radioactive Hydrogen isotope
a) ions
b) protium
c) deuterium
d) tritium

  9. Which metal is a liquid at room temperature
a) palladium (Pd)
b) helium (He)
c) mercury (Hg)
d) none

  10. When dry ice, a solid goes from solid to gas (CO2) without ever being a liquid
a) sublimation
b) combustion
c) deposition
d) this never happens

The systematic study of the physical and natural world
Atomic structure