Chapter 6 Review & Vocabulary (Chemistry of Life)
Page 145-157, 161-167
1.) Which 4 elements make up most of a human?
2.) What is the portion of an atom that contains protons and neutrons?
3.) The nucleus of an atom has a positive charge. Why?
4.) These are tiny negatively charged particles in an atom?
5.) What are the maximum electron capacities of the 1st energy level?_______2nd?______3rd?________
6.) Why are atoms said to be neutral?
7.) Carbon-13 is an ______________ of carbon?
8.) How many electrons would an atom of nitrogen have in the 2nd energy level?_____
9.) Is water an element or a compound? How do you know?
10.) A chemical bond formed when atoms share electrons is a ____________ bond?
11.) Give an example of an ion. How do you know it is an ion?
12.) All of the chemical reactions in a living thing are collectively called __________________________________?
13.) What are the two parts to a solution?
14.) How is a mixture different from a compound?
15.) A substance has a pH of 5. Is it an acid or a base?___________________
16.) KOH is potassium hydroxide. Is it an acid or a base? How do you know?
17.) H2S04 is sulfuric acid. How could you tell it was an acid by just looking at the formula?
18.) Why is water considered a polar molecule?
19.) Water has a unique property called capillary action. What is this?
20.) Water has a high specific heat. Explain what this means and explain the importance.
21.) Water creates soil. Evaluate this statement and explain based on the properties of water.
22.) What 2 “qualities” give water all its unique properties?
23.) In Kool-Aid, what is the solvent?
24.) Cellulose is an example of which macromolecule?
25.) Enzymes are IMPORTANT PROTEINS in living things. What do they do?
VOCABULARY TO KNOW
ELEMENT ISOTOPE ATOM
COVALENT BOND IONIC BOND ION
DIFFUSION ENZYME POLYMER
PEPTIDE BOND COMPOUND CAPILLARY ACTION
METABOLISM ADHESION COHESION
POLAR MOLECULE CATALYST SURFACE TENSION
DENATURE SUBSTRATE ACTIVE SITE
HYDROGEN BOND SPECIFIC HEAT