Compound has general formula C11H17N gave the following data in 'HNMR: &= 1 ppm (t, 6H), = 2.5 ppm (q, 4H), & = 3.6 ppm (s, 2H), & = 7.3 ppm (s, 5H). Suggest structure for this
compound and make interpretation of all the above data

Can someone me with these questions plz.

Name the element in group 17, period 2. (periodic table)

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.