Magnesium has 12 protons. how many electrons are in its second energy level?

The surface temperature on Venus may approach 757 K. What is this temperature in degrees Celsius? 757 K = The temperature on Mercury may drop to - 261 °F at night. What is this temperature in degrees Celsius? - 261 °F =

What is the definition of atomic number

What is the molarity of a solution that contain 1.1 miles of lithium in 0.5 liters of solution

What is likely to happen if you do not ventilate your boat after fueling? a. Gas fumes will slowly dissolve. b. Gas fumes will stay in the bottom of the boat. c. Gas fumes will give everyone carbon monoxide poisoning. d.

How many grams of ammonium sulfate can be produced if 60.0 mol of sulfuric acid react with an excess of ammonia?

How many electrons are contained in an Au3 + ion? (1) 76 (3) 82 (2) 79 (4) 197

Match the element with its number of valence electrons. Column A 1. Boron : Boron 2. Carbon : Carbon 3. Fluorine : Fluorine 4. Sodium : Sodium Column B a. 4 b. 1 c. 3 d. 7

The number of energy levels to which an electron can jump depends on the

The example of the ancient fish called a coelacanth was used to show us that science is constantly seeking new A) evidence B) ideas C) creatures D) Scientists

What factors allowed the koala population to grow beyond what their habitat could sustain?