What is the number after an elements name, representing the sum of its protons and neutrons

Do electrons have more or less mass than neutrons

What is refractions

16. State one advantage and disadvantage of rusting

Some common substances used in the laboratory are listed in the table. the chemical formulas of the substances are also listed beside their names. q: a. how many of the listed items are elements? a. 3 b. 4 c. 5 d. 6

Is Chromium (Cr) a synthetic or natural element?

In the reaction of magnesium with oxygen gas, a considerable amount of energy was released. This is an example of an exothermic reaction.

Why does an air bubble rise to the surface of a glass of water?

What term expresses the ratio of moles of reactants and products according to the coefficients in the balanced chemical equation? A) mole ratio B) reactant ratio C) product ratio D) yield ratio E) none of the above

What are some examples of kinetic energy

Under which conditions would the solubility of a gas be greatest? high pressure and high temperature high pressure and low temperature low pressure and high temperature low pressure and low temperature