Basic Matter Remediation Quiz

What is the smallest unit of a chemical element that retains its chemical properties?

• Molecule

• Atom

• Compound

• Mixture

Answer explanation

The smallest unit of a chemical element that retains its chemical properties is an atom. Atoms combine to form molecules and compounds, but only atoms are the fundamental building blocks of elements.

Tags

NGSS.MS-PS1-1

Which property measures the amount of matter in an object?

• Volume

• Density

• Mass

• Solubility

Answer explanation

Mass measures the amount of matter in an object, while volume measures the space it occupies, density is mass per unit volume, and solubility refers to how well a substance dissolves. Therefore, the correct answer is mass.

What is an "Atom"?

• The smallest unit of a chemical element

• A large molecule

• A type of mixture

• A form of energy

Answer explanation

An atom is defined as the smallest unit of a chemical element, consisting of protons, neutrons, and electrons. This distinguishes it from larger molecules, mixtures, or forms of energy, making the first choice the correct answer.

Tags

NGSS.MS-PS1-1

Define "Substance".

• A form of energy

• Matter with a uniform and definite composition

• A type of mixture

• A chemical reaction

Answer explanation

A substance is defined as matter with a uniform and definite composition, distinguishing it from mixtures, which can vary in composition. This makes the correct choice 'Matter with a uniform and definite composition'.

What is an "Element"?

• A substance that cannot be broken down into simpler substances

• A type of mixture

• A chemical reaction

• A form of energy

Answer explanation

An 'Element' is defined as a substance that cannot be broken down into simpler substances, making it a fundamental building block of matter, unlike mixtures, reactions, or forms of energy.

What is a "Mixture"?

• A combination of two or more substances that are not chemically bonded

• A form of energy

• A chemical reaction

• A single element

Answer explanation

A 'Mixture' is defined as a combination of two or more substances that are not chemically bonded, distinguishing it from pure substances and chemical reactions.

What is a "Chemical Property"?

• A characteristic that can only be observed during a chemical reaction

• A form of energy

• A type of mixture

• A single element

Answer explanation

A chemical property is a characteristic that can only be observed during a chemical reaction, such as reactivity or flammability, distinguishing it from physical properties that can be observed without changing the substance.

Which term refers to the mass per unit volume of a substance?

• Density

• Solubility

• Volume

• Mass

Answer explanation

The term that refers to the mass per unit volume of a substance is density. It quantifies how much mass is contained in a given volume, making it the correct choice among the options provided.

Which change involves a change in the form of a substance, but not its chemical composition?

• Chemical Change

• Physical Change

• Solubility

• Density

Answer explanation

A physical change alters the form of a substance without changing its chemical composition. Examples include melting, freezing, and dissolving, which all maintain the original substance's identity.

Which particle in an atom has no charge?

• Electron

• Neutron

• Proton

• Nucleus

Answer explanation

The neutron is the particle in an atom that has no charge, making it neutral. In contrast, electrons are negatively charged and protons are positively charged.