The mass number of an atom is determined by the weight of:

The mass number of an atom is determined by the weight of:
 
  a. neutrons and protons
  b. neutrons and electrons
  c. protons and electrons
  d. protons only
  e. neutrons only

Question 2

Why is carbon dioxide important in maintaining a greenhouse effect?
 
  What will be an ideal response?

Question 3

The nucleus of an atom contains:
 
  a. neutrons and protons
  b. neutrons and electrons
  c. protons and electrons
  d. protons only
  e. neutrons only

Question 4

Why is volcanism associated with regions where one plate descends below another plate?
 
  What will be an ideal response?

Question 5

All atoms of an element have the same number of:
 
  a. ions
  b. protons only
  c. neutrons only
  d. electrons.
  e. protons and neutrons