states/changes of matter
what are the 5 states of matter
liquid, solid, gas, plasma, and bose-einstein
what is a physical change
substince stays the same
what is a period
horrizontel row of elements
what is an isotope
when you change the amount of electrons
who is the founder of the atom
Democritus
what state of matter is water
liquid
what is a chemical
a new substance is made
what is a column
a group/ family
can you change the amount of protons
no
Which scientist discovered the electron using the tube experiment?
J.J. Thomson
what state of matter is cheese
solid
if I take a block of cheese and cut in half is the a chemical or physical change
physical
what period is nitrogyn in
period 5
if an atom has 18 protons and 17 electrons what is its atomic weight
35
who made an exmpeiremtent to see If thomson correct
Ernest Rutherford
name an example of plasma
sun
if you paint a house is that a physical or chemical change
physical
what column is nitrogen in
column 5
why does the isotope not behave differently
all your changing is the mass not the element
Which scientist created the first modern atomic theory
John Dalton
name an example of bose-einstein
lasers
if I take a peice of wood and burn it is a physical or chemical change
chemical
what is the column and period of the element zinc
group 12 period 4
An isotope of an element has the same number of protons but a different number of ________.
neutrons
Who discovered that electrons move in specific energy levels around the nucleus?
Niels Bohr