atomic struture Flashcards
(5 cards)
1
Q
define an atom
A
an atom is the simplest particle of an element that can exist on its own in a stable environment
2
Q
what three particles make up an atom
A
protons, neutrons and electrons
3
Q
where is each particle found
A
protons and neutrons in nucleus and electrons orbiting in outer shells
4
Q
what is the relative mass of each of the particles
A
proton:1 neutron:1 electron:1/1840
5
Q
atoms are electrically neutral why is this
A
as electrons have a relative charge of -1 and protons have a relative charge of +1 neutrons have no relative charge. since atoms have the same amount of protons and electrons atoms have no relative charge
