2021 Y9 LC4 Physics Assessment

What can be found in the nucleus of an atom?

• Protons and Neutrons
• Protons, Neutrons and Electrons
• Protons
• Neutrons and Electrons
• Alpha Particles

What is the proper name for where electrons can be found in an atom?

• Electron Shells
• Orbiting
• Nucleus
• Energy Shields
• Power Levels

Name the lead scientist responsible for the discovery of the electron.

• J.J Thomson
• Ernest Rutherford
• James Chadwick
• Niels Bohr

What is the average diameter of an atom

• 0.1 mm
• 0.1 um
• 0.1 nm
• 0.1 fm

Democritus came up with the word "atomos" which is where the word "atom" is derived from. What is the original meaning of atomos?

• Indivisible
• Individual
• Microscopic
• Muriatic Sphere
• Unknown

Define the term isotope

• Atoms of the same element with a different atomic mass
• Atoms of different element with the same atomic mass
• Atoms of the same element with the same atomic mass
• Atoms of different element with different atomic mass

What is the relative charge of a Beryllium atom with 4 protons, 3 neutrons and 2 electrons

• 2+
• 1+
• 0
• 1-
• 2-

What is the difference between Uranium-235 and Uranium-239?

• 4 Neutrons
• 4 Protons
• 4 total of either protons or neutrons
• An alpha particle

How many protons, neutrons and electrons are in this atom?

• P = 95, N = 146, e = 95
• P = 95, N = 95, e = 95
• P = 241, N = 241 e = 95
• P = 146, N = 95, e = 95
• P = 241, N = 241, e = 95

Which of the following are an isotope pair?

• Pt-195 and Pt-193
• Pt-195 and Cu-64
• Cu-64 and Zn-64
• Water and Carbon Dioxide