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Some revision questions for Edexcel specification.

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Chemistry GCSE C2aTopics1, 2 &3

Question 1 of 7

1

Name the three types of particle in an oxygen atom.

Select one of the following:

  • protons, neutrons, electrons

  • neutrons, oxygen, nucleus

  • electrons, nucleus, oxygen

Explanation

Question 2 of 7

1

State the relative mass and charge of an electron

Select one of the following:

  • mass = 1/200, charge negative

  • mass =1/2000, charge positive

  • mass = 1/2000, charge negative

Explanation

Question 3 of 7

1

The element boron has 5 protons. How many electrons does a boron atom have in its outer shell?

Select one of the following:

  • 1

  • 2

  • 3

  • 4

Explanation

Question 4 of 7

1

Is it the number of protons or the number of neutrons that defines each element?

Select one of the following:

  • protons

  • neutrons

Explanation

Question 5 of 7

1

What does the mass number represent?

Select one of the following:

  • the number of protons in the atom

  • the total number of protons and neutrons in the atom

  • the number of protons and electrons in the atom

Explanation

Question 6 of 7

1

what does the atomic number represent?

Select one of the following:

  • the number of protons in the atom , (the same as electrons)

  • the number of neutrons and electrons

  • the total number of protons, neutrons and electrons

Explanation

Question 7 of 7

1

Which is the correct definition of the term isotope?

Select one of the following:

  • Isotopes are: different atomic forms of the same element, which have the SAME number of electrons but DIFFERENT number of protons

  • Isotopes are: different atomic forms of the same element, which have the SAME number of protons but DIFFERENT numbers of electrons

  • Isotopes are: different atomic forms of the same element, which have the SAME number of protons but DIFFERENT numbers of neutrons

Explanation

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