Compare and contrast the crust, mantle, and core

If the atomic mass of an atom is 34 and the atom contains 13 protons, how many neutrons does the atom contain?

The climate of the continental united states is generally 1. tropical 2. temperate 3. arctic 4. highland

Which statement is true about this reaction? 14n+1h 15o it is a practical source of energy on earth. it occurs only outside the solar system. its product is heavier than each of its reactants. it shows the critical mass of an element.