AP Flashcards

2057897723	Atomic Mass	The average mass of all the isotopes of an element	0
2058092406	Atomic nucleus	An atom's dense central core, containing protons and neutrons.	1
2114054712	Atomic number	Number of protons in an atom	2
2114055307	Atomic symbol	A one or two letter abbreviation for an element	3
2114056063	Electron	A negatively charged particle	4
2114056687	Element	A pure substance made of only one kind of atom	5
2114057868	Group	A column on the periodic table	6
2114059616	Isotope	Atoms of the same element that have different numbers of neutrons	7
2114061969	Mass number	the sum of the number of neutrons and protons in an atomic nucleus	8
2114062947	Metal	Elements that are good conductors of heat and electric current.	9
2114064374	Metalloid	Are element with properties that fall between those of metals and nonmetals.	10
2114065839	Neutron	A subatomic particle that has no charge and that is found in the nucleus of an atom	11
2114066631	Nonmetal	Group of elements that may be solids, liquids, or gases at room temp and tend to be poor conductors of heat and electricity, and NOT malleable, ductile, or lustrous	12
2114068858	Nucleon	A proton or a neutron.	13
2114069324	Period	A horizontal row in the periodic table.	14
2114070132	Periodic table	A table that shows the elements, their atomic number, symbol, and average atomic mass; elements with similar chemical properties are grouped together.	15
2114071277	Periodic trend	Gradual change of any property in the elements across a period.	16
2114072127	Proton	A subatomic particle that has a positive charge and that is found in the nucleus of an atom	17