Atomic Structure and Isotopes Quiz

What is the main difference between isotopes of the same element?

• Number of protons
• Number of neutrons
• Number of electrons
• Atomic number

Which particle in an atom has no electric charge?

• Proton
• Neutron
• Electron
• Positron

What is the mass number of an atom?

• Number of protons
• Number of neutrons
• Number of electrons
• Sum of protons and neutrons

In the nuclide notation ²³⁵U, what does the superscript 235 represent?

• Atomic number
• Number of protons
• Number of neutrons
• Mass number

Which subatomic particle has the smallest mass?

• Proton
• Neutron
• Electron
• They all have the same mass

What is the charge of a proton relative to an electron?

• Same charge
• Opposite charge
• Half the charge
• Twice the charge

Where are protons and neutrons located in an atom?

• In the nucleus
• In electron orbitals
• In the space between nucleus and electrons
• Evenly distributed throughout the atom

What is the atomic number of an element?

• Number of protons
• Number of neutrons
• Number of electrons
• Sum of protons and neutrons

How many neutrons does Carbon-14 have?

• 6
• 7
• 8
• 14

Which statement about isotopes is correct?

• They have different numbers of protons
• They have different atomic numbers
• They have the same chemical properties
• They always have the same mass number