Which electron configuration represents an

excited state for a potassium atom?

(1) 2-8-7-1 (3) 2-8-8-1

(2) 2-8-7-2 (4) 2-8-8-2

Using the following phase diagram, the area labeled A is in what phase? Solid Liquid Gas

Which of the following has a definite shape and a denfinte volume?

When an atom loses electrons it becomes?

A 55.0 gallon drum weighs 75.0 lb when empty. What will be the total mass when filled with ethyl alcohol? (Density = 0.789 g/mL, 1 gallon = 3.78 L, 1lb = 454 g.

Based on the equation below how many liters of water can be produced from 8.5 L of oxygen gas. (assume that hydrogen is in excess) 2H2 + O2 = 2H2O

Since the early 2000s, careers in the field of genetics have grown at a rapid pace. Which of these is a probable cause for this explosion of available and expanding jobs?

How many litres of 0.215 m NaCl contains 4.30 mol of this salt? Assume this solvent is H2O I'm confused on this question because little m is molality but when I looked this up on google, someone solved the problem assuming it was molarity

How can a neutral atom become a positively-charged particle?

The last column of the periodic table contains the noble gases, elements that do not easily form chemical bonds.

When pollution is removed from the air by a natural process, it