Quiz on Atomic Structure and Orbitals

Who discovered the electron?

• Rutherford

• Bohr

• J.J. Thomson

• Chadwick

The charge of a neutron is:

• +1

• –1

• 0

• +2

What is the mass number of an atom with 11 protons and 12 neutrons?

• 11

• 12

• 23

• 1

The nucleus contains:

• Only protons

• Only neutrons

• Protons and neutrons

• Electrons

Which subatomic particle has the smallest mass?

• Neutron

• Proton

• Electron

• Positron

Which element has an atomic number of 8?

• Carbon

• Oxygen

• Fluorine

• Nitrogen

Isotopes have:

• Same mass number

• Same number of neutrons

• Same number of protons

• Same atomic number and mass number

Tritium has how many neutrons?

• 1

• 2

• 3

• 0

Isobars have the same:

• Number of protons

• Mass number

• Atomic number

• Number of electrons

Which of the following are isotones?

• ¹⁴C and ¹⁵N

• ⁴⁰Ar and ⁴⁰Ca

• ¹H and ³H

• ²H and ¹⁴C