matter, basic, chemistry, the periodic table Flashcards
1
Q
atom
A
the smallest unit of an elements properties.
ex: hydrogen, oxygen, neon, helium
2
Q
proton
A
positively charged
3
Q
neutron
A
electrically neutral
4
Q
electron
A
negatively charged
5
Q
atomic number =
A
of protons
[# of protons = # of electrons]
6
Q
atomic mass
A
of neutrons + # of protons
7
Q
isotopes
A
- different atomic forms of the same element.
- isotopes of the same elements have the same # of protons
- isotopes of the same element have different # of neutrons
8
Q
radioisotopes
A
emit energy such as subatomic particles and radiation.
ex: 12 13 14
C C C
stable. stable. unstable.
9
Q
matter
A
anything that takes up space and has mass
10
Q
all matter is made up of…
A
atoms
11
Q
3 basic states of matter
A
solid, liquid, gas
12
Q
why do the basic states of matter result in a change?
A
pressur, temperature, or volume
