Quiz on Atomic Structure

What's the exact mass of a proton?

• 0.09528 amu

• 1.007276 amu

• 1.00 amu

• 2.00 amu

Which isotope of hydrogen has two neutrons?

• Protium

• Deuterium

• Tritium

• Hydronium

What is the atomic number of Carbon?

• 6

• 12

• 14

• 8

What is the relative atomic mass of an electron compared to a proton?

• 1/1840

• 1/1000

• 1/100

• 1/10

Which particle has a mass almost identical to that of a proton, with a difference of only about 0.1%?

• Electron

• Neutron

• Alpha particle

• Positron

Which quantum number determines the shape of an electron's orbital?

• Principal quantum number (n)

• Azimuthal quantum number (l)

• Magnetic quantum number (m)

• Spin quantum number (s)

The energy levels of electrons are quantized according to which principle?

• Pauli Exclusion Principle

• Hund's Rule

• Bohr’s Postulates

• Heisenberg's Uncertainty Principle

Which isotope of hydrogen has one proton, one neutron, and one electron?

• Protium

• Deuterium

• Tritium

• Hydronium

What is the exact neutron-proton mass ratio?

• 1:1

• 1:0.9986

• 1.001:1

• 1:2

How many electrons does a O^{2-} ion have?

• 6

• 8

• 10

• 12