CHEMISTRY: CHEMICAL SYMBOLS AND FORMULAS

AI

Symbols are often shortened from the name of the elements such as He for helium and ________ for aluminum.

Subscript

________ is not written if only one atom is present.

Oxygen

________ normally exists as O₂.

Compounds

________ are composed of combinations of elements chemically combined.

Molecular formulas

________: represents the ratio in which atoms combine to form a compound.

Empirical formula

________: represents the simplest ratio in which atoms combine to form a compound.

Co

________ is a symbol for the element cobalt.

Subscript

________: the number to the right and slightly below a symbol that tells the number of atoms present.

Subscripts

________ in formulas: the use of subscripts shows the relative number of atoms of each type in a compound.

Subscript

the number to the right and slightly below a symbol that tells the number of atoms present

Subscripts in formulas

the use of subscripts shows the relative number of atoms of each type in a compound

Empirical formula

represents the simplest ratio in which atoms combine to form a compound

Molecular formulas

represents the ratio in which atoms combine to form a compound

empirical formula

represents the simplest ratio in which atoms combine to form a compound

molecular formula

represents the ratio in which atoms combine to form a compound

diatomic molecules

molecule containing two identical atoms

chemical symbol

designated letter/s to represent an element in the periodic table

formulas

symbols and subscripts used to represent the composition of a substance

qualitative data

information that cannot be counted or measured

quantitative data

information that can either counted or measured