Chemical Formula
how many atoms of carbon are included in one formula unit of the element Na2C2O4
2
What is the symbol for Silver
Ag
What is the smallest part of a substance that cannot be broken down chemically
Atom
how many atoms are in one formula unit of magnesium hydroxide, Mg(OH)2
5
What gas is used in balloons
helium
What is a substance made of two or more elements chemically bonded together
compound
how many atoms are in one formula unit of the compound FeC5O5
11
Sodium, Na, is in the same group as
K
What is a simple substance that cannot be broken down into smaller parts or changed into another substance.
element
What is the formula for sodium chloride
NaCl
rust is a compound with the formula Fe2O3. Which elements combine to form rust
iron and oxygen
What is a change from one state (solid or liquid or gas) to another without a change in chemical composition
physical change
the chemical formula for what is H2O. What does the formula show about each element in the compound.
the number of atoms of each element.
the compound potassium sulfate, K2SO4, is composed of
2 atoms of potassium, 1 atom of sulfur, and 4 atoms of oxygen
This term describes a group of two or more atoms that are chemically bonded together, representing the smallest unit of a chemical compound.
molecule