Lecture 2- Scientific Process & Chemistry

Question 1

What are the steps of the scientific method in order?

Answer 1

Observation/Question -> background research -> hypothesis -> prediction -> experiment (s) -> evaluation

Question 2

What are covalent bonds?

Answer 2

Bonds in which valence electrons are shared between two or more atoms or molecules

Question 3

How does a polar covalent bond differ from a nonpolar covalent bond?

Answer 3

Relatively large difference in electronegativity -> polar covalent bond -> electrons are shared unequally -> partial polarity (net dipole)

Question 4

What are the emergent properties of water?

Answer 4

Ability to moderate temperature (high specific heat capacity), cohesive/adhesive behavior + surface tension (hydrogen bonding), versatility as a solvent, expansion upon freezing

Question 5

What are ionic bonds?

Answer 5

Bonds in which the difference in electronegativity between atoms/molecules is so large that one atoms/molecule steals electrons from the other