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Section 2.1 Vocabulary

Across
This number gives an approximate value for the number of protons plus the number of neutrons in an atom
Pure substances composed of only one type of atom
This is formed when atoms of two or more elements bond
One of the four essential elements for life that comprise 96% of all living matter. (Hint: It has a single digit atomic number)
Individual water molecules are made up of _____ ______ bonds
The number of electrons found in a single (uncharged) atom of nitrogen
A term used to describe solutions with a pH of 0-6
Water is ______ on the pH scale
A solution with a pH of 8 could be described as a _______ _______
Down
A bond formed when electrons are transferred between atoms
The term used to describe a solution in which water is used as the solvent
The most basic unit of matter
An essential element to life that contains 15 protons.
The negatively charged components of an atom
This shows the number of protons in a single atom on a periodic table
The pH scale measure the _________ ion concentration in a solution
Bases increase the _______ ion concentration in a solution
The liquid in which other substances dissolve in a solution
Another term used to describe solutions that are basic