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C4 ATOMS

Question 1 of 10

1

The nucleus ..

Select one of the following:

  • is in the middle of the atom and contains protons and neutrons. It has a positive charge.

  • The total number of protons and neutrons.

Explanation

Question 2 of 10

1

Electrons ...

Select one of the following:

  • ...move around the nucleus in electron shells and is negatively charged. Electrons are tiny!

  • ...are useful for the hydrogenation of alkenes.

Explanation

Question 3 of 10

1

The mass of a proton is ...

Select one of the following:

  • 1

  • 2

  • 3

Explanation

Question 4 of 10

1

The mass of a neutron is ...

Select one of the following:

  • 0

  • 1

  • 3

Explanation

Question 5 of 10

1

The mass of an electron is ...

Select one of the following:

  • 5

  • 0.5

  • 0.0005

Explanation

Question 6 of 10

1

The charge of a proton is ...

Select one of the following:

  • +2

  • 0

  • +1

Explanation

Question 7 of 10

1

The charge of a neutron is ...

Select one of the following:

  • 0

  • 1

  • 2

Explanation

Question 8 of 10

1

The charge of an electron is...

Select one of the following:

  • 1

  • -1

  • 0

Explanation

Question 9 of 10

1

Who concluded from his experiments that atoms weren't solid spheres?

Select one of the following:

  • J J Thomson

  • John Dalton

  • Rutherford

Explanation

Question 10 of 10

1

Bohr suggested that electrons can only exist in _?_, or _?_.

Select one of the following:

  • nuclear atom | particle

  • fixed orbits | energy

  • fixed orbits | shells

Explanation