How do compounds differ from their component elements?

a. compounds have different numbers of neutrons than their component elements.

b. compounds have different charges than their component elements.

c. compounds have different properties than their component elements.

d. compounds have different masses than the sum of masses of their component elements.

Henry moseley used x-ray experiments to determine the atomic number of elements. how did his discovery contribute to the development of the periodic table? a.it confirmed that elements should be arranged in strict order of increasing atomic mass. b.it led to elements with similar atomic numbers being grouped together. c.it allowed the elements to be placed in strict order of increasing atomic number. d.it showed that the way mendeleev grouped elements together was completely wrong.