Changes of State
element, compound, heterogeneous mixture or solution
Chemical or Physical
Density
Atoms
100
changing from a liquid to a gas
What is evaporation or boiling?
100
carbon
What is an element?
100
tearing paper
What is a physical change?
100
You are given a mystery object and need to determine if it is more or less dense than water. You place the object in water and it sinks.
What is more dense than water?
100
the charge of a neutron
What is zero or neutral?
200
changing from a solid to a liquid
What is melting?
200
carbon monoxide (CO)
What is a compound?
200
baking soda and vinegar produce carbon dioxide and gas
What is a chemical change?
200
Steel has a density of 7.8 g/cm3. What is the mass of a block with a volume of 60 cm3?
What is 468 g?
200
Atoms have no charge because they have an equal number of ___ and ___.
What are protons and neutrons?
300
changing from a gas to a liquid
What is condensation?
300
taco salad
What is a heterogeneous mixture?
300
melting ice
What is a physical change?
300
Lead has a density of 11.3 g/cm3. What is the volume of a block of steel with a mass of 282.5 g?
What is 25 cm3?
300
Atoms in the same period have the same number of ___ ___.
What are energy levels?
400
changing from a liquid to a solid
What is freezing?
400
copper (Cu)
What is an element?
400
burning firewood
What is a chemical change?
400
A substance has a mass of 360 grams and a volume of 7.5 cm3. It's density is ___
What is 48 g/cm3?
400
An atom's mass number equals the number of ___
What are protons plus neutrons?
500
changing from a solid directly to a gas
What is sublimation?
500
salt water
What is a solution or homogeneous mixture?
500
One of these is NOT a physical property freezing point density reactivity mass
What is reactivity?
500
Uranium has an atomic number of 92 and a mass number of 238. Determine the number of each of the following: protons, neutrons and electrons.
What are 92, 146, 92?
M
e
n
u