Atoms Flashcards
Where is the nucleus found
In the middle of the atom
What does the nucleus contain
Protons and neutrons
What is the radius of the nucleus
1 * 10^-14
Is the nucleus positive or negatively charged
Positive because it contains protons
Almost the whole mass of the atom…
Is concentrated in the nucleus
How do electrons move
Orbit the nucleus in electron shells
How big is an electron
They are tiny but cover a lot of space
What is the charge of an electron
Negatively charged
What does the volume of an electron orbit determine
The size of the atom
What is the relative mass of an electron
Very very small
Basically none
What is the charge of a neutron
0
What is the charge of a proton
+1
Why are atoms neutral
Because the protons and neutrons are the same amount therefore cancelling them out
What is different about ions subatomic particles
They don’t have an equal amount of both electrons and neutrons so overall charge will not be neutral
What does the atomic number tell you
How many protons there are (same as electrons)
