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Atoms
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Properties of Water
pH
Macromolecules
100
Name the 3 subatomic particles that make up an atom.
What are protons, neutrons, and electrons?
100
An atom of Oxygen has 8 electrons. Its second energy level has how many valence electrons?
What is 6 valence electrons?
100
Water molecules are called "polar" because...
What is the oxygen end is slightly negative and the hydrogen end is slightly positive?
100
What is the general pH of cleaning products?
What is most cleaning products are bases?
100
All organic compounds contain the element of...
What is carbon?
200
Where does the atomic mass come from?
What is the nucleus= protons + neutrons?
200
An atom has 10 protons and 11 neutrons and 10 electrons, therefore its atomic mass is...
What is 21?
200
1 water molecule is bonded to another water molecule by what type of bonds?
What are hydrogen bonds?
200
What are some foods that could cause acid reflux and what would you have to take to neutralize this condition?
What are citrus, tomatoes, pineapples, etc.? In order to neutralize it take pepto, Tums, or another type of antacid which has a basic pH (greater than 7)?
200
Name the elements found in carbohydrates vs proteins.
What are carbohydrates--carbon, hydrogen, oxygen (CHO) proteins--carbon, hydrogen, oxygen, nitrogen (sometimes sulfur) (CHON)
300
What are the charges for the 3 subatomic particles?
What is protons = + neutrons = neutral (no charge) electrons = -
300
An atom that has a different number of neutrons in it's nucleus is called..
What is an isotope?
300
The cohesive forces of water lead to this property of water...
What is high surface tension...water molecules attracted to other water molecules?
300
Which side of the pH scale has more OH- ions?
What is the base side 7.1 to 14 on the pH scale?
300
What are enzymes and what type of macromolecule are they?
What is enzymes are catalysts that speed up reactions in our bodies by lowering the activation energy and they are an example of proteins?
400
What is the difference between a compound and a molecule?
What is a molecule is 2 or more atoms bonded together, where as a compound has to have 2 or more different elements bonded together?
400
An atom has 7 protons, 6 neutrons, and 7 electrons, it's atomic number is?
What is 7?
400
What is the type of bond called that binds the oxygen atom to the hydrogen atom within 1 molecule of water?
What is a covalent bond?
400
Which of the following has the most acidic pH? Apples--pH 3.3 Apricots--pH 3.8 Blueberries--pH 3.12 Oranges--pH 3.69
What are blueberries with a pH of 3.12 (closest to 0)?
400
Name the functions of lipids...
What is insulation, waterproofing for organisms, storing energy, and formation of cell membranes.
500
Draw a Bohr atomic model for Al.
What is see the board to check?
500
Explain the difference between ionic vs. covalent bonds.
What is ionic bonds are when valence electrons are transferred from one atom to another, while covalent bonds are when valence electrons are shared between atoms. Ionic bonds result in a charged molecule, while covalent bonds remain relatively uncharged due to the sharing of electrons.
500
Explain who water molecules behave during adhesion vs. cohesion.
What is during cohesion water molecules are attracted to other water molecules which lead to high surface tension. While during adhesion water molecules are attracted to different surfaces. For example in plants when the water travels from the roots to the top of the tree, this is due to capillary action.
500
Explain the difference between an acid and a base.
What is an acid has more H+ and ranges from 0-6.9 on the pH scale, while bases have more OH- and range from 7.1 to 14 on the pH scale.
500
List all 4 major classes of macromolecules and the monomers that connect to form them.
What is carbohydrates--monosaccharides, lipids--fatty acids and glycerol, proteins--amino acids, and nucleic acids--nucleotides?