SACE 1 Chem Interpreting Explicit Information

What determines the element to which an atom belongs?

• The number of electrons in the atom

• The number of protons in the nucleus

• The number of neutrons in the nucleus

• The atomic mass of the atom

What is the term used for the number of protons in the nucleus of an atom?

• Atomic mass

• Atomic weight

• Atomic number

• Proton number

Which element has an atomic number of 6?

• Oxygen

• Hydrogen

• Carbon

• Nitrogen

What does the atomic number (Z) of an element represent?

• The number of neutrons in the nucleus of each atom of that element.

• The number of protons in the nucleus of each atom of that element.

• The total number of protons and neutrons in the nucleus of each atom of that element.

• The number of electrons in the outer shell of each atom of that element.

Which element has an atomic number of 8?

• Hydrogen

• Helium

• Oxygen

• Carbon

How many protons does a helium atom have?

• 1

• 2

• 3

• 8

What does the mass number (A) of an atom represent?

• The total number of electrons in an atom

• The total number of protons in an atom

• The total number of protons and neutrons in an atom

• The total number of isotopes of an atom

Where is most of an atom's mass concentrated?

• In the electron cloud

• In the nucleus

• In the atomic number

• In the isotopes

What is the purpose of the mass number in differentiating isotopes?

• It differentiates isotopes based on the number of protons.

• It differentiates isotopes based on the number of electrons.

• It differentiates isotopes based on the atomic number.

• It differentiates isotopes based on the number of neutrons.

If an atom of chlorine-37 has 17 protons, how many neutrons does it have?

• 17 neutrons

• 20 neutrons

• 37 neutrons

• 54 neutrons