Carbon and Nitrogen are in the same period. Carbon and silicon are in the same family. Which element pair is the most similar?
O Carbon and Silicon, they share the same number of electron shells
O Carbon and Nitrogen, they share the same number of electron shells
O Carbon and Nitrogen, they share similar properties
O Carbon and Silicon, they share similar properties

The polymer used for the nonstick surface of cooking utensils is 24.0%c and 76%f by mass. what is the empirical formula of this polymer?

How does a sample of helium at 15 degree celsius compare to a sample of helium at 215 k? a) the helium at 15 degrees celsius has a higher average kinetic energy that the sample at 215 k. b) the helium at 15 degrees celsius has lower nuclear energy that the sample at 215 k. c) the helium at 15 degrees celsius has slower- moving atoms that the sample at 215 k. d) the helium at 15 degrees celsius has smaller atoms than the sample at 215 k.

Technician a says that you should never jump-start a frozen battery. technician b says that a frozen battery can explode, causing injury, when jump-started. who is correct?