periodic table
what is the chemical symbol of hydrogen
H
average mass of all isotopes
atomic mass
atoms were smooth and could not be broken down
dalton
Helium
2
proton charge
positive
whats the chemical symbol for helium
He
the periodic table is arranged in rows called
periods
dense +charge at center of an atom
rutherford
carbon
6
AMU of electrons
1/1840 AMU
Whats the chemical symbol for zinc
Zn
the elements in a column form a
group
atoms contain -charge
thomson
hydrogen
1
AMU of neutrons
1 AMU
whats the chemical symbol for silicon
Si
elements that are good conductors of electric current and heat
metals
Electrons move in cloud-like region in the nucleus
cloud model
Boron
5
electron charge
negative
Whats the chemical symbol for antimony
Sb
a material that has a high _____ is shiny and reflective
luster
specific orbits around nucleus
Bohr
sodium
11
where are the subatomic found?
found in the atom