chemistry quiz 1 Flashcards
what is matter?
anything that occupies space and has mass
what is an atom?
smallest unit of matter?
what is in center of the atom?
nucleus
what is the part around the atom called? what does it create?
electrons> orbitals, electron cloud
energy
where is a proton located and what kind of energy does it give off ?
in the nucleus and it gives off positive energy
where is the neutron located and what kind of energy do it give off?
in the nucleus
neutral energy
what kind of energy does an electron give off and where is it located?
negative energy
on the orbitals
what is atomic mass?
the number of protons and neutrons (added)
what is atomic number?
the number of protons
what is isotopes?
additional number of neutrons
where are isotopes used?
autoradiography
what is autoradiography?
when doctors deliberately make your neutrons increase more than your electrons
what happens in autoradiography?
your electrons go crazy because there are more neutrons so then they glow which outlines the problem
what is an element? an example?
composed of only one kind of atom in symbols
C, He
what is chemical formula?
the number and kind of each atom
H2«
