Column A
What are three common physical properties of matter
solid, liquid, and gas
A chemical property of wood is its?
ability to burn
A ___ property is a characteristic that describes how a substance changes into a different substance.
chemical
The parts of a _____ can be separated by physical means.
mixture
Fe
iron
How many elements have scientists discovered and named?
109 elements
When water is a solid, it is?
in a frozen state
Matter usually exists on the Earth as a ___, liquid, or gas.
solid
The formula H2O tells it is a compound that combines two atoms of _____ with one atom of oxygen.
hydrogen
Ca
calcium
How many elements are found in nature?
92 elements
The formula NaHCO3 stands for a compound that combines?
four elements
A ___ property can be observed without changing the substance into a different substance.
physical
Exhaust from a car is an example of matter in the ____ state.
gaseous
H
hydrogen
What are three common elements found in the Earth's rocks?
possible responses: oxygen, silicon, aluminum, iron, calcium, sodium, potassium, magnesium, titanium, and hydrogen.
Mixtures are unlike compounds because they?
contain substances that are not joined chemically
The ____, or center of an atom, is made of protons and neutrons.
Nucleus
A lake is an example of matter in the ____ state.
liquid
Al
aluminum
What is the difference between sodium and sodium chloride?
sodium is an element and sodium chloride is compound
____ is anything that has weight and takes up space.
matter
Usually, heat or electricity is needed to separate elements in a _______.
compound
Why do mixtures not have a chemical formula?
mixtures do not join chemically.
K
potassium