atomic structure

Multiple Choice

Which statement best describes the relationship between elements and atoms?

• Each element is made up of different types of atoms.

• All elements are made of the same type of atom.

• Each element contains atoms unique to that element.

• Atoms are not related to elements.

Open Ended

Why is it important to understand that all matter is made of atoms when studying chemistry?

Multiple Choice

Which subatomic particle is responsible for the positive charge in the nucleus of an atom?

• Proton

• Neutron

• Electron

• Photon

Multiple Choice

Which is an electron?

• A
• B
• C

Open Ended

Explain how the atomic number and atomic mass of an element are determined using the periodic table and the structure of its atom.

Multiple Select

Which of the following statements about subatomic particles is/are correct?

• Protons and neutrons are found in the nucleus.

• Electrons have a positive charge.

• Neutrons have no charge.

• Electrons are found in electron shells.

Multiple Choice

Which subatomic particle has a mass of approximately 0 amu and is located outside the nucleus?

• Proton

• Neutron

• Electron

• Quark

Fill in the Blanks

Atomic mass is defined as the mass of a single atom. It is a whole number because protons and

are the only parts of an atom that have mass.

Multiple Choice

Which subatomic particle has no charge and is located in the nucleus?

• Proton

• Neutron

• Electron

• Positron

Fill in the Blanks

Magnesium has an atomic number of 12 and an atomic mass of 24 amu. The number of neutrons in magnesium is

.

Multiple Select

Which of the following statements are true about a neutral atom?

• The number of protons equals the number of electrons.

• The number of neutrons equals the number of electrons.

• The atomic mass equals the number of protons plus neutrons.

• The atomic number equals the number of neutrons.

Open Ended

Explain how you would determine the number of neutrons in an atom if you are given its atomic mass and atomic number.

Fill in the Blanks

All matter is made of