periodic table Flashcards
who made the periodic table
Dmitri Mendeleev
what is a compound
a substance made from two or more elements chemically bonded together
what is an element
made up of one atom
what are atoms
small particles that make up everything
the atomic number is on the
A-top
B-bottom
A-top
what are atoms made of
protons,nuetrons and elecrtons
which out of protons, nuetrons and elctrons are in the nucleas of an atom
protons and nuetrons
how do you figure out the protons and electrons of an atom/element
they are the same as the atomic number
how do you figure out the nuetrons of an atom
you subtract the atomic number from the atomic mass
what is covelant bonding
sharing an electron pair between two atoms
why do non metals need to gain electrons
so they can fill the outershell and it can be happy and stable
what is an ion
an atom or group of atoms that have an electrical charge
an atom that gains electrons have more elctrons than…
have more elctrons than protons which makes it have negative overall charge=a negative ion
an atom that looses electrons has more…
has more protons which overall makes it a positive charge= a positive ion
what is a conductor
a substance that allows something to pass through it easily
