Quiz on Atomic Structure and the Periodic Table

Who proposed the modern atomic theory in 1808?

• Ernest Rutherford

• J.J. Thomson

• John Dalton

• Democritus

What is the charge of a neutron?

• 1+

• 1-

• 0

• 2+

Which particle was discovered by J.J. Thomson in 1897?

• Neutron

• Electron

• Proton

• Alpha particle

What is the principal quantum number (n) for the first energy level?

• 3

• 2

• 1

• 0

According to the Bohr model, what happens when an electron moves to a lower energy level?

• It absorbs energy

• It emits a photon

• It gains mass

• It loses charge

Which of the following elements has the highest electronegativity?

• Fluorine

• Carbon

• Oxygen

• Nitrogen

What is the formula to calculate the speed of an electromagnetic wave?

• c = λ + ν

• c = λ/ν

• c = λν

• c = ν/λ

What does the azimuthal quantum number (l) describe?

• Energy of the orbital

• Orientation of the orbital

• Shape of the orbital

• Size of the orbital

Which of the following statements is true about isotopes?

• They have the same number of protons but different neutrons

• They have different numbers of protons

• They are always radioactive

• They have the same mass number

What is the energy of a photon with a frequency of 5 × 10^14 Hz? (Use h = 6.626 × 10^-34 J·s)

• 2.000 × 10^-19 J

• 1.986 × 10^-19 J

• 1.325 × 10^-19 J

• 3.313 × 10^-19 J