Ch 1-3 Review

What is the building block of proteins?

• Amino acids

• Carboyxl groups

• Amino groups

• Side chains

What does the number of protons in the nucleus represent?

• Ion

• Isotope

• Mass Number

• Atomic number

What are substances held together by covalent bonds?

• Compound

• Molecule

• Chemical bond

• Element

What are the most electronegative elements?

• C

• F

• O

• Cl

• N

What is an atom that loses an electron and becomes positively charged/

What are weak electrical attractions between a water molecule and any other polar molecule?

• Covalent Bond

• Ionic Bond

• Hydrogen bond

• London-Dispersion forces

CH4 Is an example of a hydrophobic molecule. What does this mean?

• It is uncharged

• It is a nonpolar compound

• It loves water

• It is a polar compound

What are substances that give up protons during chemical reactions?

• Bases

• Neutral

• Acid

• Buffer

What is a compound that minimizes changes in pH

What is a measure of how much thermal/kinetic energy molecules possess?

• Heat

• Potential Energy

• Thermal Energy

• Temperature