Answer:
Strontium
Step-by-step explanation:
Strontium is a silvery-white, soft metal, good conductor of electricity. When exposed to air, it oxidizes quickly and therefore must be stored in kerosene. Upon combustion in the air, it produces a bright light and forms the oxide and the nitride of strontium. It reacts with water and from this process is formed the strontium hydroxide and released the molecular hydrogen.
It is an abundant element in nature: it is present, in the form of strontium compounds, in magmatic rocks. It is not found in its metallic form, but especially in the form of strontium sulphate.
- Electrons per layer: 2,8,18,8,2
- Electronic configuration: [Kr] 5s2
- Chemical series: Metal, alkaline earth metal, Element of the 5th Period