isotopes
Drum roll please......It's isotopes! :) yayay
two
The processes are called chemical reactions.
The ease and speed in which an element combines or reacts with other substances is called reactivity. Reactivity is a measure of how readily an element undergoes a chemical reaction.
A substance that results in a chemical change is called a reactant. Reactants are substances that are present at the start of a chemical reaction and are transformed into different substances (products) during the reaction.
A reacted element is called Reactant. It is present on left side of chemical equation.
These are called compounds unless an element, such as hydrogen, has been formed.
Substances that cannot be chemically broken down into simpler substances are called elements.
The substances you end up with in a chemical reaction are called products. These products are the result of the reactants undergoing chemical changes and forming new substances with different properties.
A change from one or more substances to another is a chemical change.
The new and different substances formed as a result of a chemical change (reaction) are the products of the reaction.
An element is a pure substance that cannot be broken down into other substances by chemical means. Each element is made up of only one type of atom. Examples of elements include oxygen, carbon, and gold.