Chemistry S1 Exam Review set 1

Front

What is the oxidation number of an element?

Back

The oxidation number is a measure of the degree of oxidation of an atom in a chemical compound, indicating the number of electrons lost or gained.

Front

What is the oxidation number of Hg in Hg₃(PO₄)₂?

Back

+2

Front

What property of matter describes the ability of a substance to be drawn into a wire?

Back

Ductility is the property of matter that allows it to be stretched into a wire.

Front

What property of matter describes the ability of a substance to be hammered or rolled into thin sheets?

Back

Malleability is the property of matter that allows it to be shaped without breaking.

Front

What is the definition of a naturalistic worldview?

Back

A naturalistic worldview assumes that matter is all that exists and that human reason informed by science is the only reliable path to truth.

Front

What is the correct name for the chemical formula HCl (aq)?

Back

Hydrochloric acid.

Front

What does the Bohr model of the atom describe?

Back

The Bohr model describes that electrons exist in a series of distinct energy levels around the nucleus.

Front

What is density?

Back

Density is the mass of a substance divided by its volume, often expressed in grams per cubic centimeter (g/cm³).

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is a substance formed when two or more different elements are chemically bonded together.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.