Consult the periodic table. an electrically neutral atom has the following electron configuration: 1 s 22 s 22 p 63 s 2 . what is the name of this atom? a)magnesium (mg)
b)sodium (na)
c)oxygen (o)
d)aluminum (al)

What does x represent in the formula for the compound xcl4?

Water (2510 g ) is heated until it just begins to boil. if the water absorbs 5.09×105 j of heat in the process, what was the initial temperature of the water?

If you chip a tooth, most likely you will go to the dentist to have the missing material filled in. currently the material used to fill in teeth is a polymer that is flexible when put in, yet is hardened to the strength of a tooth after irradiation with blue light at a wavelength of 461 nm. what is the energy in joules for a photon of light at this wavelength?