Q.1
Name the element that contains 12 protons, 12 electrons and 12 neutrons.
  • Sodium
  • Magnesium
  • Potassium
  • Aluminium
Q.2
There are two elements that are liquid at room temperature. They are...
  • chlorine and mercury
  • bromine and chlorine
  • mercury and bromine
  • mercury and phosphorus
Q.3
Chlorine has two isotopes, one with atomic mass 35 and one with atomic massPick the correct combination of subatomic particles for the two isotopes.
  • Cl 35 - 17 Protons; 17 Neutrons; 18 Electrons Cl 37 - 20 Protons; 17 Neutrons; 17 Electrons
  • Cl 35 - 17 Protons; 18 Neutrons; 17 Electrons Cl 37 - 17 Protons; 20 Neutrons; 17 Electrons
  • Cl 35 - 18 Protons; 18 Neutrons; 17 Electrons Cl 37 - 17 Protons; 18 Neutrons; 20 Electrons
  • Cl 35 - 17 Protons; 17 Neutrons; 18 Electrons Cl 37 - 17 Protons; 20 Neutrons; 20 Electrons
Q.4
Pick the correct symbol for the element with the mass number 84.
  • Bromine
  • Ar
  • Kr
  • Krypton
Q.5
An element has 45 electrons around its nucleus. The element is...
  • rhodium
  • ruthenium
  • osmium
  • iridium
Q.6
If the temperature is increased to 100°C, which element does NOT become a liquid?
  • Potassium
  • Gallium
  • Phosphorus
  • Lithium
Q.7
An element has 2 electron shells with 6 electrons in its outer shell. Which element is it?
  • Oxygen
  • Aluminium
  • Boron
  • Chlorine
Q.8
Pick the name for the element with 6 electrons.
  • Carbon
  • C
  • Boron
  • Nitrogen
Q.9
Pick the symbol pairs for elements that do NOT have the same number of neutrons in their nuclei.
  • K and Ca
  • Na and Mg
  • F and Ne
  • Li and Be
Q.10
An element has 3 electron shells with 3 electrons in the outer shell. Which element is it?
  • Oxygen
  • Aluminium
  • Boron
  • Chlorine
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