The ___ is the number of protons in the nucleus of an atom of an element.
Fill in the blank.

When the mercury level in a barometer decreases that atmospheric pressure has

Why do oxygen have a strong attractive force for electrons

Aluminum reacts with sulfuric acid to produce aluminum sulfate and hydrogen gas. how many grams of aluminum sulfate would be formed if 250 g h 2 so 4 completely reacted with aluminum? 2al( s ) + 3h 2 so 4 ( aq ) ? al 2 (so 4 ) 3 ( aq ) + 3h 2 ( g )