Atoms& Molecules
What is the smallest building block of matter?
Atom
What is the formular to measure Density?
Density = Mass/Volume
State of matter is what kind of property?
Physcial
Calcium Carbonate,CaCO3 has how many elements?
3
____________ _________ refers to the organization of the stages from when a product is made until it is disposed.
Life Cycle
A compound is a material made from...
more than one element.
If something floats, its density is greater than or less than one.
Less than
Most elements are what phase at room temperature?
Solid
Calcium Carbonate,CaCO3 has how many atoms?
5
Plastics are made from which two compounds?
Carbon and hydrogen
Two or more atoms held together by chemical bonds?
A molecule
If an object has a mass of 20 grams and a volume of 4ml, what is its density?
5g/ml
True or false? The particles in a solid never move.
False
Sodium bicarbonate has a chemical formula of NaHCO3. How many elements are in this formula?
4
Name at least two chemical properties of matter.
Reactivity to acid, flammability, ability to rust, ability to tarnish
An element is composed of only _____ type of atom.
One
The density of water is?
1g/cm3 or 1g/ml
When the temperature of liquid water rises, kinetic energy...
increases
Sodium bicarbonate has a chemical formula of NaHCO3. How many atoms are in this formula?
6
State of matter, density, mass, volume, solubility, malleability are all examples of ___________ properties.
Physical
Protons and neutrons are found in what part of the atom?
Nucleus
If an object has a mass of 24g and a volume of 12ml, what is its density? Will it float or sink?
2g/ml and it will sink.
When a gas changes to a liquid the thermal energy has increased or decreased?
Decreased
Which chemical formula represents a compound?
Fe or CO2 ?
CO2 because it's more than one element.
If you place a solid in water, you can determine...
if it is more or less dense than water