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Finely powdered strontium metal is sufficiently reactive to ignite spontaneously in air. It reacts with water quickly (but not violently like the Group 1 metals) to produce strontium hydroxide and hydrogen gas. Strontium and its compounds burn with a crimson flame and are used in fireworks. Strontiumâs Periodic Table Neighborhood Strontium is a Group 2 Alkaline earth metal. It usually exists as a divalent ion, Sr 2+, in its compounds. Strontiumâs chemistry is very similar to that of calcium, which sits above it in Group 2.
The three subatomic particles found in an atom are the Protons, Neutrons, and Electrons. But the subatomic particles found in the nucleus of an atom are the Protons, and Neutr â¦ ons. The Electrons surround the nucleus and take up most of the volume.