Atomic Structure Flashcards
What is atomic theory
Atoms make up everything and are indestructible
What did marie curie discover
Radioactivity
What model did thompson discover
Plum pudding model
What did thompson discover
Isotopes
What particles did rutherford discover
Alpha and beta
What are alpha particles/beta particles
Alpha- positive and less damaging
Beta- negative and more damaging
What did Rutherford discover about atoms
Central atom positive
What did rutherford use for his atomic experiment
Gold foil
What did bohr discover
Electrons in orbits, not floating
Shwartinger discovered?
Different shapes in different orbits
One of first lists of elements in 1790
Antoine laurent lavoisier
Who used symbols and masses in 1803
Dalton
Who organized atoms based on chem property and atomic weight and found gaps
Mendeleev
Who organized by atomic number
Moseley
Period
Row right to left of elements who gradually change
Group
Column of elements
Family
Group of elements that have similar characteristics
Representative elements
8 groups- 1 and 2, 13-18 including metals nonmetals and metalloids
Transition elements
Groups 3-12 all metal
How is periodic table organized
Color coded by metal nonmetal metalloid
Metal
Element with luster and a conduct of electricity, heat
Nonmetal
Usually gas or brittle solid at room temperature
Bad at conduction
Only 17
Metalloid
Elements between metals and nonmetals
Element key
Box representing elements showing name atomic number symbol and avg atomic mass