GCSE 1.1 Atomic Structure

Which model described the atom as a positive sphere with the electrons randomly embedded throughout?

• The Bohr Model

• The Plum Pudding Model

• The Quantum Mechanical Model

• The Electron Cloud Model

Who discovered the neutron, leading to today's model of an atom?

• Rutherford

• Bohr

• Chadwick

• Thomson

What is the approximate radius of an atom?

• 1 nm

• 0.1 nm

• 10 nm

• 0.01 nm

What is the definition of atomic number?

• The number of protons in an atom

• The number of neutrons in an atom

• The number of electrons in an atom

• The total number of protons and neutrons in an atom

What is the definition of mass number?

• The number of protons in an atom

• The number of neutrons in an atom

• The number of electrons in an atom

• The total number of protons and neutrons in an atom

What is the relative charge of an atom as a whole?

• Positive

• Negative

• Neutral

• It varies

What is the term for atoms of an element with the same atomic number but a different mass number?

• Ions

• Isotopes

• Molecules

• Compounds

What is a compound?

• A single element

• Two or more elements chemically combined

• A mixture of elements

• A solution of elements

Who developed the plum pudding model of the atom?

• Rutherford

• Chadwick

• Thompson

• Bohr

What is the relative charge of a neutron?

• +1

• 0

• -1

• +2