Please help! How many orbits will the Bohr models in the fourth period have?

Schrodinger and heisenberg developed an alternate theory about atomic nature that contradicted some of bohr's model of the atom. how do changes resulting from new technology and evidence affect the reputation of the atomic theory?

Drag each label to the correct location on the chart. classify each reaction as endothermic or exothermic.

Calculate the mass of silver needed to react with chlorine to produce 126g if silver chloride?