What is an isotope
Isotopes are forms of elements that contain equil numbers of protons but different numbers of neutrons
What is a mass number
It is the total number of protons and neutrons in an atom
Why is the mass number different in 2 isotopes
Because different isotopes of the same element have different numbers of neutrons
Why are group 1 metals called alkali metals
There reaction with metals for alkalies
Neme the products formed when chlorine reacts with potassium iodide solution
Potassium chloride solution and solid iodine
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