Letters
The chemical symbol for carbon is...
C
A combination of different elements joined together is called...
This element is one of the most common elements in the world.
Carbon
Living things need elements to do what?
Live and grow.
This shows the elements.
Periodic table.
The chemical formula for table salt is...
NaCl
One small particle of an element is called...
An atom.
This element is usually a gas at room temperature, and has the smallest atomic number.
Hydrogen
What do labels on food packages tell us?
What elements are in food.
Symbols used to show compounds are called...
Chemical formulas.
The chemical formula for water is...
H20
When two or more atoms are joined together, they make...
A molecule.
These two elements are the only ones that are liquid at room temperature.
Mercury and bromine.
What happens if an atom is ripped apart?
It releases powerful energy.
A scientist who studies what all things in the universe are made of is called a...
The chemical formula for ammonia is...
NH3
Scientists know that everything in the universe that we can observe is made from...
Elements
This element makes your bones strong.
Calcium
What are the three subatomic particles?
Protons, neutrons, and electrions.
This stands for an element on a periodic table.
Chemical symbol.
The chemical formula for table sugar is...
C12H22O11
What is the difference between a molecule and a compound?
A molecule is made of any two atoms. A compound must contain different elements.
This element is a gas at room temperature, and delightfully makes your voice sound funny.
Helium
How does the chemical makeup of a marshmallow change when you burn it?
The hydrogen and oxygen form water, which evaporates, leaving only the carbon.
This is the number you find above the element on the periodic table.
Atomic number.