Elements
C
Carbon
A bond formed when two atoms share one or more pairs of electrons
Covalent Bond
Water is a ________ molecule because it has opposite charges (+, -) on opposite ends.
Polar
The scale that measures how acidic or basic a solution is.
pH Scale
Na
Sodium
Electrons in the outermost energy level are called what?
Valence Electrons
Placing drops of water on a penny demonstrates which property of water?
Cohesion
0-6 on the pH scale
Acids
H
Hydrogen
An atom or molecule with an electrical charge (positive or negative).
Ion
Placing a paper clip on the surface of water and observing it float demonstrates which property of water?
Surface Tension
7 on the pH scale
Neutral
P
Phosphorus
Positive and negative charges ___________ one another.
Attract
Water molecules are held together by this type of bond.
Hydrogen Bonds
Coffee, Cola, Vinegar, and Lemon Juice
Acids
N
Nitrogen
The type of bond when an element loses or gains an electron.
Ionic Bond
When two or more atoms bond together they form a ____________. Water is an example.
Molecule
When the solution contains more Hydroxide (OH-) Ions
Base