Lecture 3 - Small Molecules & Chemistry of Life

Question 1

What are isotopoes?

Answer 1

forms of an element with different number of neutrons, thus different mass numbers

Question 2

what are radioisiotopes? Radioactive decay?

Answer 2

unstable isotopes, give off energy (radiation), radioactive decay is the transformation of the isotope as a result of energy release (may cause changes in protons)

Question 3

What is a covalent bond?

Answer 3

Two atoms attain stable electron number in their most outer shells by sharing one or more pairs of electrons. Typically will be between inorganic and organic compounds. (C-H)

Question 4

Difference between non-polar and polar covalent bond

Answer 4

Non-polar: electrons are shared equally due to similar electronegativity of atoms
Polar: electrons are shared unequally due to different electronegativity of atoms

Question 5

The Law of Conservation of Energy

Answer 5

energy is nor created nor destroyed (energy is transferred or transformed)

Question 6

The Law of Conservation of Matter

Answer 6

matter is nor created nor destroyed