In stars helium atoms are used with hydrogen atoms in order to produce energy.
Answer: A )
Balanced equation:
Ca(OH)2+H2SO4=CaSO4+2 H20<span />
Answer:
Beryllium
Explanation:
They are in the same group
Answer:
5
Explanation:
chemical formulas show what atoms are in a molecule. In this case there is 1 hydrogen (H), 1 chlorine (Cl), and 3 oxygens (O). The 3 behind the oxygen is a subscript and tells us that there are 3 oxygen atoms.
Another example is H2O which as 3 atoms. 2 hydrogens (H) and 1 oxygen (O). This formula has a subscript 2 behind the hydrogen showing that there are 2 hydrogens.
Answer:
(aq)
Explanation:
If the solvent is water, we use the symbol (aq) to indicate an <em>aqueous</em> solution.