Which subatomic particles are located in the nucleus of an He-4 atom

Determine the wavelength of the light absorbed when an electron in a hydrogen atom makes a transition from an orbital in the n=3 level to an orbital in the n=7 level.

What approach is required to balance the objectives of sustainable development? balancing the objectives of sustainable development requires a(n) .

Given the following reaction: c3h8+5o2=3co2+4h20 how many grams of co2 will be produced 7 g of c3h8 and 98 g of o2