Week 2: Molecules & Mols

Question 1

What is an isotope? What is a radioisotope?

Answer 1

Isotopes are atoms with same # of protons and electron but different # of neutrons.
Radioisotopes are isotopes of an atom with an unstable nucleus, decays spontaneously into nuclei of other elements, radiation emitted.

Question 1

What are the 4 major elements?

Answer 1

Carbon, hydrogen, nitrogen, oxygen

Question 2

Name the order of strong-weak for types of bonds.

Answer 2

Covalent, ionic, hydrogen

Question 3

Describe electrolytes.

Answer 3

Affects amount of water in the body, acidity of blood, muscle function, etc. Examples are K+, Na+, etc.

Question 4

Differentiate between cohesion, adhesion, and surface tension.

Answer 4

Cohesion = bond between same particles. Adhesion = bond between 2 different particles. Surface tension = amount of force to break surface layer.

Question 5

Group together the following terms; synthesis, decomposition, exergonic, endergonic, catabolic, anabolic.

Answer 5

Decomposition reactions are catabolic and exergonic.
Synthesis reactions are anabolic and endergonic.