atomic structure 1.1 Flashcards
what is group 1 in the periodic table called
alkali metals
what is group 7 in the periodic table called
halogens
what is group 8 in the periodic table called
noble gases
mass and charge of protons
mass= 1
charge= +ve
mass and charge of neutrons
mass= 1
charge= 0
mass and charge of electrons
mass= 0
charge= -ve
where are protons found in the atom
nucleus
where are neutrons found in the atom
nucleus
where are electrons found in the atom
electron shell/energy level
what does the atomic number tell us
the number of protons
what does the mass number tell us
number of protons+number of neutrons
what are isotopes
atoms of the same element that have the same number of protons but a different number of neutrons
when do elements share the same properties
when they are in the same group and have the same number of electrons on the outer shell
when are atoms stable
when they have a full outer shell
what is the relative atomic mass
the average mass number of all isotopes
