A(n) __________ is a particular type of atom; it cannot be broken down into a simpler substance by chemical means.

A(n) __________ is a substance made of atoms of different elements bonded together in a certain ratio.

A(n) _____ is an atom that has gained or lost an electron.

A(n) _____________ bond forms when atoms SHARE a pair of electrons.

A(n) ___________ is two or more atoms held together by covalent bonds.

A(n) ____________ is an attraction between a slightly positive hydrogen atom and a slightly negative atom (usually oxygen).

The attraction among molecules of a substance is called __________.

( Hydrogen bonds makes water molecules stick to each other.)

The attraction among molecules of different substances is called ________.

A _________ is a mixture of substances that is the same throughout -

it is a homogeneous mixture.

The ________ is the substance that is present in greater amounts and that dissolves another substance.

A _________ is a substance that dissolves in a solvent.

_________ is a measurement of acidity; related to free hydrogen concentration in a solution.

A(n) __________ is a compound that releases a proton - a hydrogen ion (H+) when it is dissolved in water.

A(n) ________ is a compound that removes hydrogen ions from a solution.

In many carbon-based molecules, small molecules are sub-units of entire molecules, like links in a chain. Each sub-unit in the complete molecule is called a __________.

A _________ is a large molecule, or macromolecule; made of many smaller units bonded together.

___________ are molecules composed of carbon, hydrogen, and oxygen (CHO); they include sugars and starches.

_________ are a nonpolar molecule that includes fats, oils, and cholesterol. These also are made up of carbons, hydrogens, and oxygens (CHO).

__________ is a polymer made up of monomers called amino acids. They contain carbon, hydrogen, oxygen, and nitrogen (CHON). Some come from the foods that we eat such as meat, beans, and nuts.