Why is pure silicon a poor conductor at room temperature?

What kinds of atoms are lipids mostly made of?

An atom is electrically neutral when it has no extra electrons in its valence shell. the number of electrons equals the number of neutrons. the number of electrons equals the number of protons.

Select the correct answer. Why is the melting of ice a physical change? A. It changes the chemical composition of water. B. It does not change the chemical composition of water. C. It creates new chemical bonds. D. It forms new products. E.

The ___is always equal to the number of protons + the number of neutrons that the atom has

A sample of gas has a volume of 3.50 L and a temperature of 298 K. What would be the volume of the same gas sample if the temperature is decreased to 285 K at a constant pressure?

Suppose you were given a substance and asked to determine whether or not it was a plasma. Write the characteristics you would look for to identify the substance.

What is a comet? tell in a short and easy answer

In calcium fluoride, what is the closets noble gas that each ion becomes?

Americium-241 is used in some smoke detectors. it is an alpha emitter with a half-life of 432 years. how long will it take in years for 45.0 % of an am-241 sample to decay?

What is the purpose of forming a scientific hypothesis? It starts a plan to test your idea It provides the answer to your investigation It allows you to prove your idea is correct