Question

What is megnesium ??​

Answer 1

Answer:

Magnesium is a chemical element with the symbol Mg and atomic number 12. It is a shiny gray solid which bears a close physical resemblance to the other five elements in the second column of the periodic .

Step-by-step explanation:

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Answer 2

Answer:

Magnesium is a chemical element with the symbol Mg and atomic number 12. It is a shiny gray solid which bears a close physical resemblance to the other five elements in the second column (group 2, or alkaline earth metals) of the periodic table: all group 2 elements have the same electron configuration in the outer electron shell and a similar crystal structure

Symbol: Mg

Atomic mass: 24.305 u

Atomic number: 12

Electron configuration: [Ne] 3s2

Van der Waals radius: 173 pm

Melting point: 650 °C

Density: 1.738 g/cm³