Y8 - 5.1 Structure of atom

Identify the three subatomic particles that make up an atom.

• Proton, neutron, and electron.

• Proton, photon, and positron.

• Neutron, positron, and neutrino.

• Electron, muon, and tau.

Explain the arrangement of protons, neutrons, and electrons within an atom.

• Protons and neutrons are located in the nucleus, while electrons orbit the nucleus.

• Protons and electrons are located in the nucleus, while neutrons orbit the nucleus.

• Neutrons and electrons are located in the nucleus, while protons orbit the nucleus.

• Protons, neutrons, and electrons are all located in the nucleus.

Describe the charges and relative masses of protons, neutrons, and electrons.

• Protons have a positive charge and a mass of 1 amu, neutrons have no charge and a mass of 1 amu, electrons have a negative charge and a negligible mass.

• Protons have a negative charge and a mass of 1 amu, neutrons have a positive charge and a mass of 1 amu, electrons have no charge and a negligible mass.

• Protons have no charge and a mass of 1 amu, neutrons have a negative charge and a mass of 1 amu, electrons have a positive charge and a negligible mass.

• Protons have a positive charge and a negligible mass, neutrons have no charge and a negligible mass, electrons have a negative charge and a mass of 1 amu.

How does electrostatic attraction between protons and electrons hold the atom together?

• Electrostatic attraction between positively charged protons and negatively charged electrons holds the atom together.

• Electrostatic attraction between neutrons and electrons holds the atom together.

• Electrostatic attraction between protons and neutrons holds the atom together.

• Electrostatic attraction between electrons and electrons holds the atom together.

What is the smallest unit of matter?

• Atom

• Molecule

• Cell

• Electron

What is present at the centre of an atom?

• Nucleus

• Electron

• Proton

• Neutron

What particles move around the nucleus in an atom?

• Electrons

• Protons

• Neutrons

• Quarks

What is the location of a proton in an atom?

• Shell

• Nucleus

• Orbit

• Electron cloud

Which subatomic particle has a negative charge?

• Proton

• Neutron

• Electron

• Nucleus

Fill in the blank: The mass of a neutron is _________.

• 1 unit

• 0.5 unit

• 2 units

• 0.1 unit