Atomic Structure Quiz

What is the atomic number of an element?

• The atomic number of an element is the number of electrons in the nucleus of an atom.

• The atomic number of an element is the number of protons in the nucleus of an atom.

• The atomic number of an element is the number of protons and neutrons in the nucleus of an atom.

• The atomic number of an element is the number of neutrons in the nucleus of an atom.

What are isotopes?

• Atoms of different elements that have the same number of protons.

• Atoms of the same element that have different numbers of protons.

• Atoms of different elements that have the same number of neutrons.

• Atoms of the same element that have different numbers of neutrons.

Which of the following is true about atomic mass?

• Atomic mass is the total mass of an atom of an element, without considering the different isotopes.

• Atomic mass is the average mass of an atom of an element, taking into account the different isotopes and their abundance.

• Atomic mass is the same for all isotopes of an element.

• Atomic mass is determined by the number of protons in an atom.

What is the atomic number of carbon?

• 6

• 12

• 8

• 16

Which of the following elements has the highest atomic number?

• Helium

• Hydrogen

• Neon

• Oganesson (Og)

What is the atomic mass of hydrogen?

• 1.02

• 1.01

• 1.008

• 1.001

Which of the following elements has the most stable isotope?

• Lead (Pb)

• Uranium (U)

• Polonium (Po)

• Bismuth (Bi)

What is the atomic number of an element with 8 protons and 9 neutrons?

• 7

• 9

• 16

• 8

What is the atomic mass of an element with 20 protons and 22 neutrons?

• 40

• 44

• 38

• 42

Which of the following elements has the highest atomic mass?

• Hydrogen (H)

• Helium (He)

• Lithium (Li)

• Oganesson (Og)