atoms peridoic table

the smallest partcle of an elementwith all chemical proterties of an element

atom

the central part of the atom containing protns neutrons and holding most of the atoms mass

nucleus

a subatomic paricle in the nucleus that has a positive eelectric charge

proton

a negativly charged particle that moves outside the nucleus is much smaller than protons and neutrons.

electrons

atoms of the same element that have a different number of nutrons but the same number of protonse

isotopes

a chart that organizes elements by their atomic number and shared chenical properties

periodic table

the count of protons in an atom nucleus which is also the electron count

atomic numbera

a horizantal row in the peridic table

period

a vertical column in the periodic table

group

what is a pure substance only made of one type of atom

an element

what are the part of the atoms and there charges

protons neitrons and electrons their charges are +protons, neutrons=, electrons-

what is the overall charge of a atom

neutral [zero]

how do you find the atomic mass of an atom

mass number plus number of protons plus nutrons

what are valence electrons

the electrons locatedin the outermost shell

what is a molecule

the smallest particle of a substance

who created the periodic table

dimitri medelayev

how do you find the number of nutrons from the atomic mass

subtract the atomic number from the atomic mass round the atomic mass

how many groups and peroids are in the preeodic table

18 groups 7 periods

what groupm is the most reactive and the least

alkali metels group 17 noble gases group 18

whatr are the elements in the periodic table arranged by

their atomic number

which element is found in group 18 period 4

kryton

based on where it is on the periodic table how many protons nutrons and electrons are on the element neon

10 nutrons 10 electrons 10 protons