What is the electron structure of a sodium atom?

A. 1s22s22p63s1

B. 2s22s22p63s1

C. 1s22s22p63s6

D. 1s12s22p63s1

Which of these is a covalent bond

How many chloride ions are in a 220 grams of calcium chloride?

Which of the following is NOT a true state- ment about gases?

Zinc and sulfuric acid solution produce zinc sulfate solution and hydrogen balanced chemical equation

An atom of potassium with a mass number of 40 is known as K-40. Use the periodic table to determine how many neutrons are present in an atom of K-40. Type the correct answer in the box. Use numerals instead of words. One atom of K-40 has neutrons.

Write and balance the double replacement reaction between barium sulfate and titanium (II) oxide.

What do a Am radio, Fm radio, television and cell phones have in common. A.) they were all invented in the same year B.) they were all invented by the same scientist C.

Consider the reaction: 2 NO (g) + 5 H2 (g) → 2 NH3 (g) + 2 H2O (g) A reaction mixture initially contains 5 moles of NO and 10 moles of H2. Which set of amounts best represents the mixture after the reactants have reacted as completely as possible?

True or False: If you have 2 moles of water and 2 moles of carbon, you have the same number of molecules.

Balancing chemistry equations