Atoms+ Periodic Table Flashcards
what is the relative charge of a proton
+1
where are protons found in an atom
in the nucleus
why’s is the relative mass of a neutron
1
what is the relative charge of a neutron
0
where are neutrons found in atoms
in the nucleus
what is the relative mass of an electron
0
what is the relative charge of an electron
-1
where are electrons found in atoms
in the shells
what is the atomic number of an element in the periodic table
number of protons
what does the proton number also tell us? (other than number of protons)
the number of electrons
why does the proton number of an atom equal the electron number
all atoms are neutral, so the amount of protons which have a +1 charge must be equal to the number on electrons which have a -1 charge
what is the mass number on the periodic table
the number of protons add the number of neutrons
how do we find the amount of neutrons in an atom
mass number minus atomic number
potassium has a mass number of 39 and an atomic number of 19. what does this mean particle wise
it has:
•19 protons
•19 electrons
•20 neutrons
what is the relative mass of a proton
1
