HCPA Atomic Theory Vocabs
Law of Conservation of Mass - Ans the mass of the products in a chemical
reaction must equal the mass of the reactants.
Law of Definite Proportions - Ans states that a given chemical compound always
contains its component elements in fixed ratio (by weight) and does not depend on
its source and method of preparation.
Law of Multiple Proportions - Ans states that when two elements combine to form
more than one compound, the mass of one element, which combines with a fixed
mass of the other element, will always be ratios of whole numbers.
Atoms - Ans the basic unit of a chemical element.
Nuclear Forces - Ans a strong attractive force between nucleons in the atomic
nucleus that holds the nucleus together.
Atomic Number - Ans the number of protons in the nucleus of an atom, which
determines the chemical properties of an element and its place in the periodic table.
Isotopes - Ans each of two or more forms of the same element that contain equal
numbers of protons but different numbers of neutrons in their nuclei, and hence
differ in relative atomic mass but not in chemical properties.
Mass Number - Ans the total number of protons and neutrons in a nucleus.
