Flashcards Matter Vocabulary

Front

Atom

Back

Atoms are the smallest part of a substance that can still be recognized as that substance (the smallest unit of matter).

Front

Atomic Mass

Back

Atomic mass is the number of protons and neutrons of an element.

Front

Atomic Number

Back

Atomic number is the number of protons in the atom’s nucleus.

Front

Chemical Bond

Back

Chemical bonds are strong attractions that hold atoms together.

Front

Chemical Symbol

Back

Chemical symbols are one-, two-, or three-letter abbreviation of the name of an element.

Front

Chemical Formula

Back

Chemical formulas show the elements in a compound, each represented by its chemical symbol. The number of each type of element in the compound (other than one) is represented by a small number (the subscript) to the right of the element symbol.

Front

Chemical Equation

Back

Chemical equations are used to model chemical changes, illustrating how elements become rearranged in a chemical reaction.

Front

Chemical Change

Back

Chemical change is a change that occurs when one or more substances change into entirely new substances with different properties.

Front

Coefficient

Back

Coefficient is the number in front of the formula; it tells us how many molecules of a given formula are present.

Front

Compounds

Back

Compounds are formed when two or more atoms combine. Compounds can be represented by chemical formulas.