Why do lithium (Li) and sodium (Na) have similar properties?

A. They are in the same period.

B. They are in the same group.

C. They have the same number of electron shells.

D. There names both end with "ium"

The most common sulfur ion has a charge of

What two forces are acting on the balloon when it is stuck to the wall and which is stronger?

A. Explain the difference between an exothermic chemical reaction and an endothermic chemical reaction. B. How is the enthalpy of reaction related to the enthalpies of formation for the products and reactants?

What is the name for the chemical formula K3PO4, and is it ionic or covalent?

Cyclic compounds that contain a nitrogen atom are called

Which of the following statments is true for gas particles? they move freely and combine with each other. they dont move at all they move slowly and in a structured pattern they are constantly in motion and changing position.

What is the effect of a catalyst on a reaction? It increases the entropy. It decreases the entropy. It changes the equilibrium. It makes the products more stable.

Where should you place the title when constructing a graph?

Which of the following applies to He gas in the tank when additional oxygen is added at constant temperature? A rigid metal tank contains oxygen gas. A. The volume of the gas increases B. The pressure of the gas decreases C.

Which statement does NOT coincide with kinetic-molecular theory? A.) Gas particles assumed to have an insignificant volume B.) Gases are made up of hard spherical particles C.) All gases particles move in a constant random motion D.