Balance chemical equations

What are the series of metals in the following element?

• K, Na, Ba, Ca, Zn

• Mg, Al, Zn, Fe, Ar

• Cl, Br, K, Hg, Au

• H, C, O, N, P

Metal + acid =>

• salt + water

• water + hydrogen

• salt + hydrogen

• salt

What is the ion of Na (Z=11)

• Na^-

• Na⁺

• Na²⁺

• Na^2-

What is the ion of Cl (Z=17)

• Cl⁺

• Cl²⁺

• Cl^-

• Cl^2-

Ion Al³⁺ and SO4^2- will form the compound with formula

Al + HCl =>

We have ions Al³⁺ and Cl^- , find the products and balance the above equation

Ca + HBr =>

We have ions Ca²⁺ and Br^- , find the products and balance the above equation

...C + ...O2 => ...CO

Balance the equation?

Fe + H2SO4 =>

We have ions Fe²⁺ and SO4^2- , find the products and balance the above equation

Li + H2SO4 =>

We have ions K⁺ and SO4^2- , find the products and balance the above equation