Which best describes the asteroid belt a. another name for the oort cloud b. the region where comets originate c. large chunks of gas, dust and ice d. millions of small rocky objects

Select the atomic models that belong to the same element

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

What is a possible quantum number set for an electron in the 3s orbital of a magnesium atom