Strontium, a group 2 element with an electron configuration of 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 6 5s 2 , will form a ion in a chemical bond. +1 +2 -1 -2

The molecular formula for caffeine is cshion402. which of the following elements is not found in caffeine?

Calculate the molarity of each of the following solutions. part a) 0.12 mol of lino3 in 5.5 l of solution part b) 60.7 g c2h6o in 2.48 l of solution part c) 14.2 mg ki in 100 ml of solution

The number of neutrons is equal to the atomic number minus the atomic mass. a. true b. false