GCSE Chemistry Quiz - Chapters 1-4

What is the smallest part of an element that can exist?

• Molecule

• Atom

• Compound

• Electron

What is the key characteristic of a mixture?

• Chemically combined elements

• Chemically combined compounds

• Elements or compounds not chemically combined

• New substances are formed

Which model suggested that the atom is a ball of positive charge with negative electrons embedded in it?

• Nuclear model

• Plum pudding model

• Bohr model

• Rutherford model

Who adapted the nuclear model by suggesting that electrons orbit the nucleus at specific distances?

• James Chadwick

• Ernest Rutherford

• Niels Bohr

• J.J. Thomson

What did the alpha particle scattering experiment conclude about the atom?

• The atom is a solid sphere

• Electrons are embedded in a positive sphere

• The mass of an atom is concentrated at the nucleus

• Atoms cannot be divided

Who provided the evidence for the existence of neutrons within the nucleus?

• Niels Bohr

• James Chadwick

• Ernest Rutherford

• J.J. Thomson

What is the difference between the plum pudding model of the atom and the nuclear model of the atom?

• The plum pudding model has a dense nucleus.

• The nuclear model has electrons embedded in a positive sphere.

• The nuclear model has a dense nucleus with electrons orbiting around it.

• The plum pudding model has a dense nucleus with electrons orbiting around it.

What is the relative electrical charge of a proton?

• 0

• +1

• -1

• +2

What is the relative electrical charge of a neutron?

• +1

• 0

• -1

• +2

What is the relative electrical charge of an electron?

• +1

• 0

• -1

• +2