atoms Flashcards
1
Q
what is in the nucleus and which are positive and neutral
A
protons which are positive and neutrons which are neutral
2
Q
what orbits the nucleus and is it positive or negative
A
electrons which are negative
3
Q
why do atoms not have an overall charge
A
as there are the same number of positive protons and negative electrons with the same size charge, therefore the charges cancels out
4
Q
what does the nuclear symbol tell you
A
the mass and atomic number
5
Q
what does the atomic number tell you about the atom
A
the number of protons
6
Q
what does the mass number tell you
A
the total of protons and neutrons
7
Q
how do you work out the number of neutrons
A
by subtracting the atomic number from the mass number
8
Q
is the nucleus positively or negatively charged
A
positively
