Chapter 2 Flashcards
Actinide
Inner transition metal in the bottom of the bottom two rows of the periodic table
Alkali Metal
Elements in Group 1
Alkaline Earth Metal
Elements in group 2
Alpha Particle
Positively charged particle consisting of two protons and two neurons
Anion
Negatively charged atom or molecule (contains more electrons than protons)
Atomic Mass
Average mass of atoms of an element (amu)
Atomic Number
Number of protons in the nucleus of an atom
Binary Acid
Compound that contains hydrogen and one other element bonded in a way that imparts acidic properties to the compound (ability to release H+ ions when dissolved in water)
Binary Compound
Compound containing two different elements
Cation
Positively charge atom or molecule (contains fewer electrons than protons)
Chalcogen
Elements in group 16
Chemical Symbol
one, two, or three-letter abbreviation used to represent an element or its atoms
Covalent Bond
attractive force between the nuclei of a molecule’s atoms and pairs of electrons between atoms
Covalent / Molecular Compound
Composed of molecules formed by atoms of two or more different elements
Electron
Negatively charged, subatomic particle of relatively low mass located outside the nucleus
Empirical Formula
Formula showing the composition of a compound given as the simplest whole-number ratio of atoms
Group
Vertical columns of the periodic table
Halogen
Elements in group 17