Science Project
By: Adrian Allotey
Elements and Compounds
Compounds are 2 or more elements combined.
Hydrogen is an element and water is a compound.
Compound
It's a compound because two elements are combined. In this case it's Hydrogen and Oxygen
Element
This is the element Hydrogen. It's an element because it's not combined with another element and it can't be separated into a simpler substance.
Some differences between the two are that an element has only one one exact atom , but a compound has two or more different atoms, compounds can be separated into simpler substances by chemical means but elements can't, and elements are shown on the periodic table, but compounds are not.
Chemical Formulas
Chemical Formula 1
The number of capital letters tells you the number of elements. The small number to the right of the capitalized letter tells you the number of that element there are.
Chemical Formula 2
This is a good example showing the parts of a chemical formula
Chemical Formula 2
Na is the symbol for Sodium, S is the symbol for Sulfur, and O s the symbol for Oxygen.
Coefficients and Subscripts
-They tell you how much of the the rest of he formula should be multiplied by
Subscripts are the small numbers to the right of a symbol in a chemical formula
-They tell you how many times the element is used.