15 did henry moseley affect the development of the periodic table?
a. he discovered that the number of valence electrons increase to a
full octet.
b. he discovered that groups of elements have similar properties.
c. he discovered that neutrons affect an element's atomic mass.
d. he discovered that each element has its own atomic number.

D

Explanation:

D. He discovered that each element has its own atomic number.

b.final

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.