The electron configuration of a cation with a 2+ charge is shown below. 1s22s22p63s23p6

What is the electron configuration for the ion’s neutral parent atom? The atom is a main group element. Name the group that the parent atom likely belongs to on the Periodic Table and identify one chemical property of the parent atom.

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’s the percent by mass of carbon in c10h14n2

1. list three scientific reasons cockroaches may fly.