Mass is not conserved in a nuclear reaction because the missing mass is turned into energy. Einstein discovered that mass is a very concentrated form…

Matter cannot be created or destroyed in chemical reactions. This is the law of conservation of mass. In every chemical reaction, the same mass of matter must end up in the products as started in the reactants. Balanced chemical equations show that mass is conserved in chemical reactions.

Even in a chemical reaction when atoms interact and create new products, mass is conserved. The atoms from the reactants come apart, rearrange and re-bond in a different arrangement to form the products. No new atoms have entered or left the system so the mass is conserved.

In both nuclear and chemical reactions, two physical quantities are seen to be conserved and unchanging: the number of particles and the total charge. A constant number of particles in nuclear reactions does not imply that mass is conserved. The difference represents the conversion of some of the mass into energy.

The law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations. According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.

In general, the atomic mass number is not conserved in nuclear reactions. Nuclear reactions are subject to classical conservation laws for charge, momentum, angular momentum, and energy (including rest energies).

Matter is anything that has mass and takes up space. Matter can change form through physical and chemical changes, but through any of these changes, matter is conserved. The same amount of matter exists before and after the change—none is created or destroyed. This concept is called the Law of Conservation of Mass.

Q: In a nuclear reaction, mass decreases and energy increases. However, it’s more correct to say that the sum of mass and energy is always conserved in a nuclear reaction. Mass changes to energy, but the total amount of mass and energy combined remains the same.

Well, the mass number and the charge are the two things that are always conserved in a nuclear reaction in every nuclear reaction.

In both nuclear and chemical reactions, two physical quantities are seen to be conserved and unchanging: the number of particles and the total charge. A constant number of particles in nuclear reactions does not imply that mass is conserved.

Why is it important for an equation to be balanced? An equation is said to be balanced when the number of atoms of each element is the same on both sides of the reaction (reactant side and product side). It means that the law of conservation of mass is obeyed.

Displacement reactions occur when a metal from the electrochemical series is mixed with the ions of a metal lower down in the electrochemical series. The atoms of the more reactive metal push their electrons on to ions of the less reactive metal.

A double displacement reaction is a type of chemical reaction in which the reactant ions exchange places to form new products. Usually, a double displacement reaction results in precipitate formation. The chemical bonds between the reactants may be either covalent or ionic.

There are three types of double displacement reactions: precipitation, neutralization and gas formation.