Unit 2 Chemistry RO Flashcards
(23 cards)
Atoms
the basic unit of a chemical element.
Molecules
a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.
Substances
a particular kind of matter with uniform properties.
Homogenous mixtures
a gaseous, liquid or solid mixture that has the same proportions of its components throughout a given sample.
Heterogeneous Mixtures
a mixture in which the composition is not uniform throughout the mixture.
Chemical properties
a characteristic of a particular substance that can be observed in a chemical reaction.
Physical properties
a characteristic of a substance that can be observed or measured without changing the identity of the substance.
Isotopes
Atoms with the same number of protons but different numbers of neutrons.
Compounds
a thing that is composed of two or more separate elements; a mixture.
Elements
a substance made up of only one type of atom, each with the same number of protons.
Reactants
the starting materials in a reaction that undergo a chemical change to form a product
Products
the species formed from chemical reactions.
Hydrogen Bonds
The hydrogen bond is the eminently electrostatic attractive force between an electronegative atom and a hydrogen atom.
Covalent Bonds
Is the interatomic linkage that results from the sharing of an electron pair between two atoms.
Cation
a positively charged ion.
Ionic Bonds
formed between two or more atoms by the transfer of one or more electrons between atoms.
Periodic Table- Groups
a column in the periodic table of the chemical elements.
Anion
an atom that has more electrons than protons.
Periodic Table Rows
periods or series.
Valence Electrons
a single electron or one of two or more electrons in the outer shell of an atom that is responsible for the chemical properties of the atom.
PH Scale
a measure of how acidic/basic water is.
Acids
a chemical substance, usually a liquid, which contains hydrogen and can react with other substances to form salts.
Bases
a substance that reacts with an acid in an acid-base reaction.
