chem
what is a atom
the smallest unit of matter that makes up everything
what is in the center of the atom
the necleus
what charge does protons have
positive
what charge do nuetrons have
nuetral
what charge do electrons have
negative
what is a atomic number
number of protons
what is atomic mass
the number of protons+ nuetrons
where are protons+ nuetrons found
in the neucleus
where are the electrons
outside the neucleus in shells
are compounds chemically bonded or mixed
chemically bonded
how many atoms are compounds made of
2 types
how many types of atoms are elements made of
one type
where are all elements found
periodic table
what chemical symbol does hydrogen have
H
what chemical symbol does carbon dioxide have
CO2
what chemical formula does Cu have?
Copper
what chemical formula does CH4 have
methane
what is a vertical line in periodic table called
group
what is a horizontal line in the periodic table called
period
how many types of atoms are there
92 types