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What is an element?
A substance that cammot be broken down further by physical or chemical means.
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What is a covalent compound?
A compound which is made of 2 non-metals sharing electrons to have a full valence shell.
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What is an ion?
A charged atom that has lost or gained electrons.
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What are valence electrons?
The electrons on the ouside shell (valence shell)
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What is a compound?
A substance that cam be broken down into elements by chemical change.
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What are the charges of Protons, Neutrons, and Electrons?
Positive, Neutral, and Negative
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Where are Protons, Neutrons, and Electons located in an element?
- Protons - In the nucleus
- Neutrons- In the nucleus
- Electrons - In shells or orbits
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What are the sizes of Protons, Neutrons, and Electrons?
- Protons and Neutrons - Big
- Electrons - Small
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What are physical and Chemical changes?
Physical - It doen't change very much
Chemical - It changes a lot.
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How do electons transfer?
From Metals to non metals.
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What are the Greek Prefixes for mollecular compounds?
- 1- mono
- 2-di
- 3-tri
- 4-tetra
- 5-pent
- 6-hex
- 7-sept
- 8-oct
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What are polyatomic compounds made of?
A Covalent compound + a metal element
Makes a covalent/ionic bond
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What are Hydrocarbons?
A mollecular compoud which contains Carbon and Hydrogen.
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What are the states of Chemical Reactions?
- Gass -g
- Solid -s
- Liquid - l
- Aqueous - aq
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What are the properties of mollecular compounds?
- - low melting points
- - Sometimes dissolves in water (usually doesn't)
- - Do not conduct electricity
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What are the properties of ionic compounds?
- - High melting points
- - Dissolve in water
- - Conduct electricity
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What are properties of Acids?
Sugary tasting and good conductors of electricity.
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What are the properties of bases?
Bitter-tasting, slippery-feeling, good conductor of electricity.
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What is the range of the PH scale?
0-14
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What is neutral on the PH scale?
7
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