What is the percent composition of hydrogen in H2O2, hydrogen peroxide? a. 94%

b. 75%

c. 50%

d. 6%

When determining the shape of a molecule, it is important to draw a lewis dot structure first in order to see the total number a. electrons within the moleculeb. bonding and unshared pairs around central atomc. unshared pair within the molecule( i really need it )

Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.

Which of these statements explains the difference between nuclear binding energy and the strong nuclear force ?