The average the natural abundances of the various isotopes of carbon to arrive at the fractional mass.
The correct answer is option 1. Be, Mg, and Ca is the correct order arranged in increasing atomic radius. This is predicted based on the periodic table. The atomic sizes increases as one moves downwards in the periodic table.
Voltage difference is the push that causes charges to flow from high to low areas.
Answer:
a compound,typically a crystalline one,in which water molecules are chemically bound to another compound or an element
