Chemical Reactions and Laws of Chemical Combination Quiz

Chemical Reaction Concepts

• Molecules that interact to produce new compounds in a chemical reaction are called reactants.
• The Law of Conservation of Mass states that matter can neither be created nor destroyed during a chemical reaction.
• The Law of Constant Proportions is also known as the Proust's Law.

Conservation and Structure in Chemistry

• According to the law of conservation of mass, mass remains conserved; the total mass of reactants equals the total mass of products in a chemical reaction.
• The defining structure of an element that cannot be broken down by any chemical means is an atom.

Dalton's Atomic Theory and Atomic Properties

• According to Dalton's Atomic Theory, atoms are described as indivisible particles that combine in whole-number ratios to form compounds.
• The atomic radius represents the distance from the nucleus of an atom to the outermost electrons, indicating the size of the atom.

Mass and Molecular Calculations

• The mass number of an element is equal to the total number of protons and neutrons in its nucleus.
• Atomic mass is commonly expressed in terms of atomic mass units (amu).
• Molecular mass is calculated by summing the atomic masses of all atoms present in a molecular formula.