Use the periodic table to answer the questions: Which is the correct electron configuration for sodium (Na) ?

1s22s22p62d1

1s22s22p63s1

1s22p63d3

A bottle of perfume is opened at one end of a room. A person sitting at the other end smells the perfume within a few minutes. Which of the following explanations is true? a.

The equation below shows hydrogen reacting with oxygen to produce water. 2H2+O2>2H2O if 16mol of oxygen were reacted with excess hydrogen gas, how many moles of water would be produced?

To describe the length of a classroom, a student should use A) centigrams B) centimeters C) kilometers D) meters

Which one of the following types of elements is most likely to be a good oxidizing agent? Group of answer choices a) transition elements b) alkaline earth elements c) alkali metals d) lanthanides e) halogens.

How many calcium ions are in a sample of 7.36 grams of calcium phosphate?

Constance is making a vegetable soup that contains carrots, beans, water, salt, pepper, bits of ham, and onions. the soup has to cook for 4 hours. while the soup is cooking, what will happen to some of the minerals that are in its ingredients?

Which of the following form solid solutions? Select all that apply. naturally occurring minerals gases present in air HCl and water sugar and water metal alloys

Alan's go-kart travels 1750 feet per minute, and Barry's go-kart travels 21 miles perhour. Who's go-kart travels faster?

What needs to happen for a solute to dissolve in a particular solvent? A) the attractions between the solute and solvent molecules must be greater than the attractions keeping the solute together and the attractions keeping the solvent together.

Which is a conversion factor for this statement of equality: 12 in. = 1 foot? 12 feet1 in. 12 feet 1 in. 1 in. 12 feet 1 in. 12 feet 1 foot12 in. 1 foot 12 in. 1 foot1 in. 1 foot 1 in.