How many electrons are in the first shell of a hydrogen atom?
  • 1
  • 2
  • 3
  • 4
Which element has 2 electrons, 2 neutrons and 2 protons?
  • Fluorine
  • Sodium
  • Helium
  • Neon
An element has 2 electrons in its inner shell, 8 in its next shell and 1 in its outer shell. What type of ion would it form?
  • 1-
  • 1+
  • 2+
  • 3-
An atom has 2 electrons, 2 neutrons and 2 protons. What is the atomic number of this atom?
  • 6
  • 1
  • 2
  • 4
An atom has 7 electrons - 2 in its inner shell and 5 in its outer shell. What group of the periodic table is this element found in?
  • 2
  • 3
  • 4
  • 5
An atom of which element has 11 electrons?
  • Potassium
  • Sodium
  • Magnesium
  • Neon
An atom contains 9 electrons. How many neutrons are there in the nucleus of this atom?
  • 10
  • 9
  • 19
  • 11
How many electrons are in the outer shell of a nitride 3 ion?
  • 5
  • 3
  • 8
  • 7
How many electrons are in the first shell of a carbon atom?
  • 1
  • 2
  • 4
  • 6
A fluorine atom has 9 electrons - 7 in its outer shell and 2 in its inner shell. How many electrons would be in the outer shell if it were to become a fluoride ion?
  • 2
  • 4
  • 6
  • 8
0 h : 0 m : 1 s

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