Understanding Atomic Structure

What is the charge of a proton?

• -1

• +2

• 0

• +1

What is the charge on an electron?

• +2

• -1

• +1

• 0

What particle in an atom has a negligible mass compared to protons?

• Neutron

• Muon

• Electron

• Positron

What does the atomic number of an element represent?

• Number of electrons in a neutral atom

• Total number of protons and neutrons

• Number of protons

• Number of neutrons

How do you calculate the number of neutrons in an atom?

• Atomic number + Atomic mass

• Atomic mass - Atomic number

• Atomic number / Atomic mass

• Atomic number - Atomic mass

What does the atomic mass number indicate?

• Number of electrons

• Number of protons

• Total number of protons and neutrons

• Total number of electrons and protons

What is the most common isotope of uranium found in Earth's crust?

• Uranium-236

• Uranium-235

• Uranium-238

• Uranium-234

What happens when an electron absorbs electromagnetic radiation?

• It becomes a neutron

• It moves to a lower energy level

• It leaves the atom

• It moves to a higher energy level

What is ionization in the context of atomic particles?

• Losing a neutron

• Gaining a neutron

• An electron escaping the atom

• A proton being added

What is the charge of an atom that has lost an electron?

• Positive

• Negative

• Neutral

• Double positive