Which two elements have the same number of valence electrons?

Na and Sr

Zr and H

O and S

Mg and P

In liquid water, an equilibrium exists between H2O (ℓ) molecules, H + (aq) ions, and OH - (aq) ions. A person experiencing acid indigestion after drinking tomato juice can ingest milk of magnesia to reduce the acidity of the stomach contents.

If the mass of a particular atom is exactly 5 times the mass of an atom of carbon-12, what is its mass

Why soft drink is a mixture and water is compound

3. How do scientists determine whether a chemical reaction releases or stores energy? A. Scientists can calculate the bond energies of the reactants and the products. B . Scientists compare the total bond energies of the reactants and the products.

How many grams of lithium hydroxide are produced when 492 grams of water reacts with lithium nitride

What kinds of scientific investagations involve making observations

According to the kinetic molecular theory, when a gas particle hits something what will happen?

Protons and neutrons are made from which of the following? hadrons down quarks only up quarks and down quarks up quarks only

Not all of the water falls as rain, snow, or sleet evaporates. What happens to the rest of the water?

58.5 million excess electrons are inside a closed surface. What is the net electric flux through the surface?.