Biology 101 Unit 2 Key Terms Flashcards

Front

What is an acid?

Back

A molecule that donates hydrogen ions and increases the concentration of hydrogen ions in a solution.

Front

Define adhesion.

Back

Attraction between water molecules and other molecules.

Front

What is an aliphatic hydrocarbon?

Back

A hydrocarbon consisting of a linear chain of carbon atoms.

Front

What is an anion?

Back

A negative ion formed by an atom gaining one or more electrons.

Front

Define aromatic hydrocarbon.

Back

A hydrocarbon consisting of closed rings of carbon atoms.

Front

What is an atom?

Back

The smallest unit of matter that retains all of the chemical properties of an element.

Front

What does atomic number represent?

Back

The total number of protons in an atom.

Front

Define atomic weight.

Back

Calculated mean of the atomic weights of an element’s isotopes.

Front

What is a balanced chemical equation?

Back

A statement of a chemical reaction with the number of each type of atom equalized for both the products and reactants.

Front

What is a base?

Back

A molecule that donates hydroxide ions or binds excess hydrogen ions, decreasing the hydrogen ions' concentration in a solution.