Which type of reaction always has an element and a compound as reactants

Which of the following is true about a scientific theory? a. a theory is a proposed explanation for a hypothesis b. a theory can be changed to explain new observations or experimental results c. a theory can be formed after a single experiment d.

Explain why liquids unlike gases are virtually incompressible

For the main group elements (excluding the transition elements), is it necessary to memorize the type of ion each element makes or could you predict the ion charge using a periodic table?

Why did the alpha particles bounce back during Rutherford's experiments?

In order to make the halogen atom stable, by having a complete outer shell of electrons, what would be an easier solution compared to removing all of the valence electrons

If you had 17.3 g of hydrogen and 8.91 g of oxygen, which is the limiting reactant, and how many grams of water could you produce.

Which choice is not a property of an acid? turns litmus paper blue neutralize bases turns litmus paper red corrodes active metals

Samantha is using a lever to lift a rock. To life the rock most easily, where should she apply force to the lever

Which metal is the most abundant in the Earth's crust? copper (Cu) aluminum (Al) iron (Fe) zinc (Zn)

What is the empirical formula of a compound that is 56.95% cu, 14.37% s, and 28.68% o?