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What is an element?
A substance that cammot be broken down further by physical or chemical means.
What is a covalent compound?
A compound which is made of 2 non-metals sharing electrons to have a full valence shell.
What is an ion?
A charged atom that has lost or gained electrons.
What are valence electrons?
The electrons on the ouside shell (valence shell)
What is a compound?
A substance that cam be broken down into elements by chemical change.
What are the charges of Protons, Neutrons, and Electrons?
Positive, Neutral, and Negative
Where are Protons, Neutrons, and Electons located in an element?
- Protons - In the nucleus
- Neutrons- In the nucleus
- Electrons - In shells or orbits
What are the sizes of Protons, Neutrons, and Electrons?
- Protons and Neutrons - Big
- Electrons - Small
What are physical and Chemical changes?
Physical - It doen't change very much
Chemical - It changes a lot.
How do electons transfer?
From Metals to non metals.
What are the Greek Prefixes for mollecular compounds?
- 1- mono
What are polyatomic compounds made of?
A Covalent compound + a metal element
Makes a covalent/ionic bond
What are Hydrocarbons?
A mollecular compoud which contains Carbon and Hydrogen.
What are the states of Chemical Reactions?
- Gass -g
- Solid -s
- Liquid - l
- Aqueous - aq
What are the properties of mollecular compounds?
- - low melting points
- - Sometimes dissolves in water (usually doesn't)
- - Do not conduct electricity
What are the properties of ionic compounds?
- - High melting points
- - Dissolve in water
- - Conduct electricity
What are properties of Acids?
Sugary tasting and good conductors of electricity.
What are the properties of bases?
Bitter-tasting, slippery-feeling, good conductor of electricity.
What is the range of the PH scale?
What is neutral on the PH scale?