Which of the following properties is NOT common to alkaline earth metals? a low density b react more quickly than alkali metals c do not occur naturally d soft and silvery

The first element on the periodic table of elements is carbon. a. true b. false

Agas diffuses 1/7 times faster than hydrogen gas (h2). what is the molar mass of the gas? 100.10 g/mol 98.78 g/mol 86.68 g/mol 79.98 g/mol

Use this information to determine the number of calends electrons in the atoms. which of the following correctly compares the stability of the two atoms? a) both are unreactive b) both are highly reactive c) a is unreactive and d is reactive d) a is reactive and d is unreactive