1.D 2.C 3.B 4.A is the answer i believe you're looking for.
True. light is particles. photons, however are waves.
B. intermolecular attractions.
Answer:
the element to be found is helium(He)
Hydrogen is the first element in the periodic table and only has one proton, one neutron, and one electron. The charge is zero but there are two charged particles.