Biology I-1: Chapter 2 Vocab

Front

Basic unit of matter

Back

atom

Front

Center of an atom containing protons and neutrons; in cells, structure with genetic material (DNA).

Back

nucleus

Front

Negatively charged particle surrounding the nucleus

Back

electron

Front

Pure substance of one type of atom

Back

Element

Front

Form of an element with same protons but different neutrons

Back

isotope

Front

Substance formed by the chemical combination of two or more elements in definite proportions.

Back

compound

Front

Chemical bond formed by transferring electrons between atoms

Back

ionic bond

Front

Type of bond where electrons are shared

Back

covalent bond

Front

Weak attraction between hydrogen and another atom

Back

Hydrogen bond

Front

Attraction between molecules of the same substance (e.g., water to water)

Back

Cohesion