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  1. Definition of Ca:
    1.1 Names:
    1.1.1 Common name: Calcium
    1.1.2 English name: Calcium
    1.2 Atomic mass: 40.08
    1.3 Atomic weight: 40.08
    1.3.1 Molecular Structure: Calcium is a pure chemical element, it has no molecules.
    1.4 Ion structure: Ca^2+

  2. Properties of Ca:
    2.1 Physical properties of Ca:
    State: Solid at room temperature
    Color: Silver-white
    Smell: Odorless
    2.2 Chemical Properties of Ca: Calcium reacts with water to form calcium hydroxide and hydrogen gas, it is also capable of reacting with oxygen and nitrogen gas.

  3. Common chemical equations involving Ca:
    3.1 Metal reaction:
    Ca + 2H2O -> Ca(OH)2 + H2
    3.2 Acid reaction:
    Ca + 2HCl -> CaCl2 + H2
    3.3 Nonmetal reaction:
    Ca + O2 -> CaO
    3.4 Reaction with salts:
    Ca + Na2CO3 -> CaCO3 + 2Na

  4. Synthesis of Ca
    4.1 Laboratory synthesis of Ca: Calcium cannot be synthesized in the laboratory because of its high chemical reactivity.
    4.2 Industrial synthesis of Ca: Calcium is produced by the electrolysis of molten calcium chloride compound.

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