Physical Science 18.1 Review

Front

What is a compound?

Back

A compound is a substance formed when two or more elements chemically bond together, resulting in a substance with properties different from those of the individual elements.

Front

How do the properties of compounds compare to the properties of the elements that make them up?

Back

Compounds have different properties from the elements that compose them.

Front

What is the law of definite proportions?

Back

The law of definite proportions states that a chemical compound always contains its component elements in fixed ratio by mass.

Front

What is the difference between a mixture and a compound?

Back

A mixture is a physical combination of two or more substances where each retains its own properties, while a compound is a chemical combination that results in a new substance with different properties.

Front

What is a chemical bond?

Back

A chemical bond is the force that holds atoms together in a compound, which can be ionic or covalent.

Front

What is an ionic bond?

Back

An ionic bond is a type of chemical bond formed through the electrostatic attraction between oppositely charged ions.

Front

What is a covalent bond?

Back

A covalent bond is a type of chemical bond where two atoms share one or more pairs of electrons.

Front

What is the significance of chemical formulas?

Back

Chemical formulas provide a way to represent the composition of a compound, indicating the types and numbers of atoms present.

Front

What is a molecular compound?

Back

A molecular compound is a compound formed by covalent bonds between nonmetal atoms.

Front

What is a chemical reaction?

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.