Atoms and Atom Model

small in size

very heavy

harmful

enlarge in size

2 electrons in K shell and 4 in M shell

2 electrons in L shell and 4 in M shell

2 electrons in K shell and 4 in L shell

4 electrons in K shell and 2 in L shell

neutrons only

electrons only

particles in the nucleus

protons only

negative

positive

neutral

unchanged

faults in human body

faults in metals

thieves and robbers

weapons

electron number

proton number

nucleon number

mass number

fire up wood

generate electric current

light up a bulb

light up a whole town

cation

anion

positron

negatron

Na^–

Na⁺

Na_–

Na₊

heat

boiled water

radiations

energy