Atoms, Ions, Isotopes

ions

charged atoms (more electrons than protons or less)

can the number of protons change in an ion

no, if the number of protons changes, it becomes a new element

protons carry a

positive charge

protons - electrons

=charge

atomic mass is on the top left corner, atomic number...

is on the bottom left

non metals form...

anions

anions are

negatively charged ions

in general, metals form...

cations

cations are

positively charged ions

which ton metals appear to be an exception

transition metals

halogens make up most of the

anions

alkaline earth metals contain

most of the cations

ions are always made the same w/in families of elements, so if you know the families they belong to, you could figure what out?

ion charge

1 amu=

1.66054 x 10^-27kg

-1 proton/ 1 neutron

why cant you measure atomic mass in kilograms

the mass would be way to small to quantify using kilograms

why do electrons not contribute to mass

they are too small

what do all ions and isotopes have in common?

atomic number

isotopes

atoms with more or less neutrons than protons

atomic mass- atomic number=

neutrons

atomic mass of single atom

grams/atoms

percent abundance of isotopes

number of atoms/total number of atoms

atomic mass average

percent#1(mass of atom 1) +percent#2(mass of atom 2), etc.

are amu sigfigs

no, they are exact values. you cant have 1.752 protons...

atomic mass is

relative