Chemical or Physical Change?
Candle wax melting
Physical change
Dalton's model of the atom is nicknamed ______
billiard ball model
An isotope has a different number of _______
neutrons
A cation has _____ charge (positive or negative)
positive
Group 1 elements are metals or non-metals?
Wick of a candle changing color
chemical change
After JJ Thomson discovered electrons, the ______ model of the atom was created based on a British desert
plum pudding model
Carbon has 6 protons.
How many neutrons does Carbon-13 have?
7
An anion has _____ charge (positive or negative)
negative
liquid
Ice melting
physical change
Rutherford discovered that most of the atom is _____ when he shot alpha particles at a thin sheet of gold
empty space
18
Elements in group 1 (alkali metals) like to form _____ ions
+1
Group 7 elements are known as ________
halogens
Chemical change
In the plum pudding model it was believed that mass and positive charge were _________
equally distributed throughout the atom
How do you define the atomic weight that's listed under the element symbol on the periodic table?
"Atomic weight is the average weight of an element with respect to all its isotopes and their relative abundances"
Elements in group 7 (halogens) like to form _____ ions
-1 ions
Group 8 elements do not like to form compounds with other elements. They are known as ______
noble/inert gases
Wood burning
chemical change
We now know that subatomic particles are actually made of smaller particles called _______
quarks!
This will not be on the quiz
The atomic weight of carbon is 12.01. If both carbon-12 and carbon-13 exist, which one do you think is more abundant?
Carbon-12
Metals tend to form _______-ions and non-metals tend to form _______-ions
Non-metals = anions
Aluminum