Biology Chemistry Unit Test Review Images in this power point were obtained from Google Images
What is Matter? Anything that has _______and _________.
What is Matter? Anything that has mass and volume.
What is the smallest unit of matter? Hint: not a Chihuahua!
What is the smallest unit of matter? An Atom!
What is an ? Hint: It’s not the skateboarding company!
An element is “pure stuff”. It is only one kind of atom in matter such as pure gold (Au) from the periodic table. Other Examples: Carbon Hydrogen Oxygen Sodium Phosphorous
What are atoms made up of? Hint: 3 Things
What 2 larger particles are in the nucleus of the atom and make up the MASS of the atom? What are their charges? What are the smallest particles in the space outside of the nucleus that do not add to its mass? What is its charge?
What 2 larger particles are in the nucleus of the atom and make up the MASS of the atom? What are their charges? Protons (+) and Neutrons (0) What are the smallest particles in the space outside of the nucleus and do not add to its mass? What is its charge? Electrons (-)
This is the element Boron and how it appears on the periodic table. What is this number called? What does this number represent? What is this number called? What does this number represent?
Represents the # of Protons (+) Also indicates # of electrons (-) Represents the # Protons + # Neutrons
AN ION is when an atom has gained or lost electrons Chloride gains an electron Becomes (-) Sodium loses an electron Becomes (+) Na + CL → Na⁺CL⁻
“I”onic Bond: When electrons are lostorgained(NO SHARING) between atoms. Hint: “I” am greedy! “I” give or take but do not share! NaCl
What is a covalent bond? Atom Hint: Co-captains share their position Atom
Covalent bond: When two atoms are sharing an electron pair in a compound.
Isotopes are different numbers of NEUTRONS! Isotopes of Carbon
Define: • Molecule • Compound
Molecule • Compound • Same Definition: • 2 or more elements chemicallycombined
What type of changes in matter would be considered to be chemical?
What does a pH scale indicate (do not say the pH number). It is the concentration of ___?___ in a solution.
What does a pH scale indicate? (do not say the pH number). It is the concentration of Hydrogen ions (H+)in a solution. Know which numbers are acidic and basic Strong AcidWeak Acid pH= 1,2,3 pH=4,5,6 Neutral pH = 7 Weak BaseStrong Base pH= 8,9,10 pH=11, 12, 13, 14
What is a buffer? Don’t have a clue? We have been dealing with pH, so it probably has something to do with that.
Buffer A weak acid or weak base that can react with strong acids or bases to make small pH changes and maintain pH balance HOMEOSTASIS
Define & Give and Example: • Solute • Solvent • Solution
Solvent : What does the dissolving Ex: WATER (Best Solvent) Solute: What is dissolved by the solvent Ex: SALT Solution: When a solute is dissolved into a solvent Ex: Salt + Water
What is the name for a type of mixture that there is NO DISSOLVING taking place?
Suspension Examples: Sand + Water Oil + Vinegar
COHESION? Samemolecules sticking together Water + Water
What is ADHESION? 2 different molecules that stick together Ex: Water and glass
What is the weak bond called that forms between the polar molecules of water?
What is polarity? H (+) H (+) O (-) See a resemblance?
Polarity: Unequal sharing of electrons (H₂O) causing (+) on one side and (-) on the other H (+) H (+) See a resemblance? O (-)
??????????? ????????? process of joining monomers to make polymers
Polymerization process of joining monomers to make polymers