what is anything that has mass?
matter
what is the smallest unit of matter?
atom
what is a single type of atom?
elements
what is molecules?
combinations of atom
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what are the 3 compounds, what are they?
-Compound: 2 or more types of an atom
-Organic Compound: contains carbon and hydrogen
-Biomolecules: found in cells
What are the two types of bonds?
What do their lines look like?
-Covalent Bond: Solid Line
-Hydrogen Bond: Dashed Line
-What happens to Electrons in a covalent bond?
-How strong/weak is the bond?
-Electrons are shared between two atoms
-Strongest Bond
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-What happens to electrons in an iconic bond?
-How strong/weak is the bond?
-Electrons are transferred from one atom to another, not shared
-Middle Strength Bond
-How are hydrogen bonds created?
-How strong/weak is the bond?
-through the attraction between a positive hydrogen atom in one molecule and a highly electronegative atom
(like oxygen, nitrogen, or fluorine)
-Weak Bond
what is polarity?
having two opposite sides or charges — like a positive and a negative.
what is cohesion adhesion?
what does it create?
-property of water, where is can stick to itself
-creates surface tension on water
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which way does water freeze?
top to down
what is hydrophobicity?
-Water fearing/ Does not dissolve in water
-Example: Oil
what is hydrophilic?
-Water loving
-Example: Sugar
can ions and polar molecules dissolve in water?
yes
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