chem
Terms
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- arrangement of the modern periodic table
- by mass and atomic number
- intensive properties
-
dont depend on quantity of substance
density, temperature - metallic elements
- luster, high heat conductivity,
- atoms
-
building blocks of matter
make elements
all atoms of a given element are the same
atoms of an element arent
changed into different types of atoms by a chemical reaction
compounds are formed when atoms of 1+ elements are combined - isotopes
-
different number of neutrons
single molecule of an isotope is a nucleid - cathode rays and the cathode ray tube
-
jj thompson
mass to charge ratio
shows that atoms have a negative charge - metalloids
- share properties of both, lie on either side of step
- alpha particles
- positive
- rutherfords model of the atom
- PLUM PUDDING!
- beta particles
- negative
- names of groups on periodic table
- alkali, alkali earth metals, chalcogens, halogens (nonmetals-most reactive) noble gas, coinage metals
- hydrogen oxygen ratio by mass
- 1.01:16
- nonmetals
- separated by diagonal step line
- extensive properties
- mass or volume
- gold foil experiment
-
atoms shot into gold foil,
showed positively charged nucleus - gamma particles
- neutral