When heat energy is added, two changes are observed: change A: solid changes to a liquid. Change B: Solid changes directly to a gas. What are the names for phase changes A and B

Write the chemical symbols for three different atoms or atomic cations with 27 electrons. asap!

Compare and contrast the bohr model and the electron cloud models of the atom.

Achemist 16 drop copper metal from copper chloride solution. the chemist place is 0.50 g of aluminum foil in a solution containing 0.75 g of copper (ii) chloride. a single replacement reaction takes place. which statement explains the maximum amount of copper that the chemist can extract using this reaction?