How many electrons are in the nucleus of an atom with an atomic number of 20?

Using at least two properties of ionic compounds, explain why cookware is not made from ionic compounds.

15.) Solar energy, wind, and geothermal are what type of energy resource? a.) Inexhaustible b.) Inexpensive c.) Nonrenewable d.) Chemical

What is the chemical equation for aluminium chloride

What problems can arise if plants and animals are transferred from their natural communities? Select all that apply. overpopulation disease wiping out habitats extinction by not mating unbalanced trophic levels

Charles' law explains which of these phenomena? A. why a balloon deflates when the air around it cools B. why solids require heat in order to change into gases C. why the pressure of a gas increases when volume decreases D.

A silver coin rubs vigorously against a wool cloth. becomes positively charged. Which statements are true? The silver coin lost electrons. The silver coin gained electrons. The wool cloth lost electrons. The wool cloth gained protons.

Which is not a characteristic of chemical equilibrium

Determine how many moles of hydrogen are needed to produce 50 grams of ammonia.

Why is it important to compensate for pressure and temperature when an orifice is used to measure gas flow

Which of the following parts of a circuit would be considered a load? Justify your answer by explaining your choices • light • switch • motor • battery