Atom

What are the three subatomic particles that make up an atom?

• Protons, electrons, neutrons
• Protons, electrons, photons
• Neutrons, electrons, positrons
• Protons, positrons, neutrons

What is the role of protons in an atom?

• Determining the atomic mass
• Determining the identity of an element
• Balancing the charge of electrons
• Stabilizing the nucleus

Which subatomic particle is responsible for determining the identity of an element?

• Positrons
• Neutrons
• Electrons
• Protons

Which subatomic particle is responsible for stabilizing the nucleus of an atom?

• Protons
• Positrons
• Neutrons
• Electrons

What is the role of electrons in an atom?

• Determining the atomic mass
• Stabilizing the nucleus
• Balancing the charge of protons
• Occupying energy levels around the nucleus

How do the number of protons and neutrons relate to the atomic mass of an element?

• They are randomly assigned
• They are directly proportional
• They are unrelated
• They are inversely proportional

What is the term 'atomic mass unit (amu)' used to measure?

• Electron charge
• Proton mass
• Atomic number
• Atomic mass

What is the atomic number of an element determined by?

• Number of electrons
• Number of neutrons
• Atomic mass
• Number of protons

How does the number of protons relate to the identity of an element?

• No relationship
• Determines the atomic mass
• Balances the charge
• Determines the atomic number

Which of the following best describes the structure of an atom?

• Nucleus containing electrons and neutrons, surrounded by protons
• Nucleus containing electrons and protons, surrounded by neutrons
• Nucleus containing protons and electrons, surrounded by neutrons
• Nucleus containing protons and neutrons, surrounded by electrons