5.05 Atomic Structure

What is the smallest unit of matter that retains the properties of an element?

• Nucleus

• Molecule

• Atom

• Electron

What particles are found in the nucleus of an atom?

• Ions and molecules

• Neutrons and electrons

• Protons and electrons

• Protons and neutrons

What is the charge of an electron?

• Positive

• Neutral

• Negative

• Variable

What describes how easily an atom can combine with other chemical species?

• Mass number

• Electronegativity

• Atomic number

• Valency

What is a molecule?

• A pure element

• A single type of atom

• A type of ion

• A group of atoms bonded together

What type of bond involves the sharing of electron pairs between atoms?

• Hydrogen bond

• Metallic bond

• Covalent bond

• Ionic bond

What is an ion?

• A stable atom

• An atom with no charge

• An atom or group of atoms with a net charge

• A molecule that has lost electrons

Which of the following is a characteristic of protons?

• Positively charged

• Negatively charged

• Variable charge

• No charge

What is the valence shell?

• The shell that contains neutrons

• The outermost shell of an atom

• The shell with the highest energy level

• The innermost shell of an atom

Which element is liquid at room temperature?

• Carbon

• Oxygen

• Hydrogen

• Bromine