As you move from left to right across the periodic table __. Question options: The atoms become more reactive. The number of electron shells on the atom increase. The atoms decrease in mass. The number of valence electrons on the atom increase.

Iron (ll) and Oxygen formula and correct name.

A fourth person at the campfire doesn't care about cold hands. He only cares that his hot chocolate stays warm.

Many nonscience careers require a knowledge sicence because workers must

The gases carbon dioxide, oxygen, and argon are mixed in a container. All gases have the same partial pressure, and the total pressure of the container is 32,680 Pa. What is the partial pressure of argon?

There are 2.2 mg of lead in exactly 500 g of a water sample. What would the concentration of lead be in parts per million? Round to the nearest tenth. Don't forget the units.

How do the products and reactants of a chemical change compare? The mass of the products is greater than the mass of the reactants because energy is taken in by the reaction.

All the following are characteristic properties of phosphorus. Which one is a chemical property? (a) When exposed to air, white phos - phorus will burn spontaneously, but red phosphorus will not. (b) Red phosphorus and white phos - phorus are solids.

What are the monomers of proteins called

What type of fermentation occurs in yeast?

How much energy is required to vaporize 0.5kg of water?