Atomic Structure Quiz

What is the charge of an electron?

• Positive

• Negative

• Neutral

• Variable

Which subatomic particle is found in the nucleus of an atom?

• Electron

• Proton

• Neutron

• Both B and C

What is the atomic number of an element?

• The number of protons

• The number of neutrons

• The number of electrons

• The total number of protons and neutrons

Which of the following is a characteristic of isotopes?

• Different number of protons

• Different number of electrons

• Different number of neutrons

• Different atomic numbers

What does the isotope notation Carbon-14 represent?

• Carbon with 14 protons

• Carbon with 14 electrons

• Carbon with 14 neutrons

• Carbon with a mass number of 14

Which force holds the nucleus together despite the repulsion between protons?

• Gravitational force

• Electromagnetic force

• Strong nuclear force

• Weak nuclear force

What is the maximum number of electrons that can occupy the first shell of an atom?

• 2

• 8

• 18

• 32

Which element is more reactive, sodium (Na) or potassium (K)?

• Sodium

• Potassium

• Both are equally reactive

• Reactivity cannot be determined

Who discovered the electron?

• Ernest Rutherford

• Niels Bohr

• J.J. Thomson

• Dmitri Mendeleev

Which of the following elements is considered a halogen?

• Neon

• Argon

• Fluorine

• Xenon