Compounds containing chlorine have long been used to disinfect the water in swimming pools, but in recent years a compound of a less corrosive halogen has become a popular alternative disinfectant. What is the name of this fourth-row element

Explanation:

A period 4 element is one of the chemical elements in the fourth row (or period) of the periodic table of the elements.

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Period 4 element.

HydrogenRubidium

Strontium

Yttrium

Zirconium

Niobium

the child will have heterozygous dominant chromosomes as characters of his father are dominant over the characters of his mother.

the child is heterozygous

they vary. it used to be meat, grain, bread, candy, beverages, donuts, and fruits/vegetables. now they added exercise in.