The radius of a hydrogen atom is about 0.37 å, and the average radius of the earth’s orbit around the sun is about 1.5 x 108 km. find the ratio of the average radius of the earth’s orbit to the radius of the hydrogen atom

Which symbol can be used to indicate the pressure at which a chemical reaction is carried out? 25°c 2 atm pa

How many oxygen atoms are there in 3.15 moles of hcl manganese (iv) oxide, mno2

Which statement best summarizes the importance of ernest rutherford’s gold foil experiment? it proved that all of john dalton’s postulates were true. it verified j. j. thomson’s work on the atomic structure. it showed that an electron circles a nucleus in a fixed-energy orbit. it showed that a nucleus occupies a small part of the whole atom.