Match each element to the number of electrons in its valence shell
Term Definition
Beryllium (Be) A) Two
Carbon (C) B) One
Lithium (Li) C) Four
Boron (B) D) Three

The order above is wrong, match them correctly.

In a laboratory experiment, a fermenting aqueous solution of glucose and yeast produces carbon dioxide gas and ethanol. the solution was heated by burning natural gas in a bunsen burner to distill the ethanol that formed in the flask. during the distillation, the ethanol evaporated and then condensed in the receiving flask. the flame of the burner was kept too close to the bottom of the flask and some of the glucose decomposed into a black carbon deposit on the inside of the flask. during this experiment the following changes occurred. which of these changes involved a physical change and not a chemical change? check all that apply. 1-condensation of ethanol 2-evaporation of ethanol 3- formation of carbon dioxide gas from glucose burning of natural gas 4-formation of ethanol from glucose by yeast 5-formation of a carbon deposit inside the flask

What must occur for air masses to form fronts

The number of neutrons is equal to the atomic number minus the atomic mass. a. true b. false