In the graphic, 195 represents the _. 195 Pt
78

A. Atomic Mass
B. Atomic Number
C. Neutron Number​

Which statement about the stamps is correct?

An observation that requires measurement is called quantitative observable or qualitative

Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.