8th grade chemistry

Noble gases are a group of nonreactive gases found in Group 18 of the periodic table, including helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn).

A solute is a substance that is dissolved in a solvent to form a solution. In the case of sugar dissolved in water, sugar is the solute.

Reactants are the starting substances in a chemical reaction, found on the left side of a chemical equation.

A mixture is a combination of two or more substances that are not chemically bonded and can be physically separated.

A compound is a substance formed when two or more elements are chemically bonded together, such as sugar (C12H22O11).

The periodic table is a tabular arrangement of chemical elements, organized by increasing atomic number and grouped by similar properties.

An element is a pure substance that cannot be broken down into simpler substances by chemical means, consisting of only one type of atom.

A chemical reaction is a process in which substances (reactants) are transformed into new substances (products) through the breaking and forming of chemical bonds.

A solvent is a substance that dissolves a solute, resulting in a solution. Water is often referred to as the universal solvent.

A compound consists of two or more elements chemically bonded together, while a mixture consists of two or more substances that are not chemically bonded.