Cram exam Flashcards
group
elements in a column
period
elements in a horizontal row
molecules
Atoms can combine
molecular compounds
Compounds composed of molecules usually contain only nonmetallic elements
diatomic molecule
molecule that contains two atoms
ions
Atoms can either gain or lose electrons, forming charged particles
cations
Metals tend to lose electrons, becoming positively charged ions
anions
Nonmetals tend to gain electrons, forming negatively charged ions
ionic compounds
electrically neutral, containing both cations and anions, they usually contain both metallic and nonmetallic elements
polyatomic ions
Atoms that are joined together, as in a molecule, but carry a net charge
In naming an ionic compound, the______ is named first and then the_____
cation, anion
alkanes
Hydrocarbons in which each carbon atom is attached to four other atoms
hydrocarbons
contain only carbon and hydrogen
isotopes
Atoms of the same element that differ in mass number
Thomson’s experiments on the behavior of cathode rays in magnetic and electric fields led to the discovery of
electron and allowed its charge-to-mass ratio to be measured
