The Atomic Essentials Quiz

What does the atomic number of an element represent?

• The number of protons in the nucleus

• The number of neutrons in the nucleus

• The total number of protons and neutrons in the nucleus

• The total number of electrons orbiting the nucleus

Which of the following elements has an atomic number of 1?

• Helium

• Hydrogen

• Oxygen

• Carbon

What is the atomic mass of an element?

• The mass of an electron

• The mass of a proton

• The total mass of the protons and neutrons in the nucleus

• The total mass of the electrons orbiting the nucleus

Which element has an atomic number of 8?

• Nitrogen

• Oxygen

• Carbon

• Hydrogen

The atomic mass is usually closest to the sum of the numbers of which particles in an atom?

• Protons and electrons

• Neutrons and electrons

• Protons and neutrons

• Neutrons only

How many protons does Carbon have?

• 6

• 12

• 14

• 8

What is the significance of the atomic mass number?

• It determines the chemical properties of the element.

• It is used to calculate the mass of molecules.

• It indicates the size of the atom.

• It helps to identify the isotope of the element.

Which of the following statements is true about isotopes?

• Isotopes of an element have different numbers of protons.

• Isotopes of an element have the same atomic number but different atomic masses.

• Isotopes of an element have different numbers of electrons.

• Isotopes of an element have the same number of neutrons.

What determines the chemical behavior of an atom?

• The number of neutrons

• The atomic mass

• The number of protons

• The number of electrons

Which element has an atomic mass of approximately 1?

• Helium

• Hydrogen

• Oxygen

• Nitrogen