Formula & Equations
Elements are the ingredients of the universe. When they are combined, they make a compound. Elements are found on the periodic table, which has 116 of them. Chemical formulas show the compositions of the elements making up a compound. Subscripts can be found in the chemical formula, they tell us how many atoms of each element are in a compound.
What is a chemical formula?
A representation of elements and compounds by the use of symbols.
What two things are indicated by a chemical formula?
Elements and compounds.
What two pieces of information are needed to determine the ratio of elements in a compound?
Coefficients and Subscripts.
Name the four different types of atoms that are in the chemical equation.
1. Nitrogen
2. Hydrogen
3. Oxygen
4. Chromium
How many hydrogen atoms are in the reactant?
8
How many hydrogen atoms are in the product?
2
Explain how to determine if a chemical equation is balanced or unbalanced.
If an equation is balanced, it will have the same number of atoms and
Is the above chemical equation balanced or unbalanced?
Explain why or why not.
What does a chemical equation represent?
Name the three main parts of a chemical equation.
What does the arrow stand for in a chemical equation?
Explain how the Law of Conservation of Matter applied in a chemical equation.
How are coefficients (the numbers in front of the formulas) used to balance chemical equations?