Question

b) A student adds a metal to water; it floats and burns with a lilac flame. On the Periodic Table above, use the letter X to show the position of this metal.

Answer 1

The metal is potassium

potassium is the metal that burns with a lilac color flame when put in water , and potassium has atomic number 19 and is in the 1st group because it has 1 valence electron in its outermost shell , its is in the 4th period because it has 4 electron shells in its atom.

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