midterm practice 2

Front

What is a pure substance?

Back

A pure substance is a material made up of only one type of particle, which can be either an element or a compound.

Front

Give an example of a pure substance.

Back

Carbon is an example of a pure substance.

Front

What is a covalent compound?

Back

A covalent compound is a chemical compound formed by the sharing of electrons between atoms.

Front

How do you name a covalent compound with five sulfur and three oxygen atoms?

Back

It is named pentasulfur trioxide.

Front

What group is boron found in on the periodic table?

Back

Boron is found in group 13.

Front

What do the vertical columns on the periodic table represent?

Back

The vertical columns represent the number of valence electrons (electrons in the outermost shell) of the elements.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture where the components are not uniformly distributed and can be easily separated.

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture that has a uniform composition throughout.

Front

Define an element.

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together.