sub atomic particles Flashcards
(8 cards)
1
Q
what is the radius of an atom?
A
1x10-1m (-10 small in corner)
2
Q
what is the radius of a nucleus?
A
1x10-14m (-14 small in corner)
3
Q
what is the mass number?
A
(top number) protons + neutrons
4
Q
what is the atomic number?
A
(bottom number) protons
5
Q
how do you calculate the number of neutrons?
A
mass number - atomic number
6
Q
how do we find out the number of electrons?
A
it’s the same as the number of protons
7
Q
give 2 facts about the nucleus
A
made up of protons and neutrons
positively charged
8
Q
give 2 facts about the electron
A
very small, light
able to be be lost or gained in chemical rections
