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12 comes in 2a group in the periodic table
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Answer:
=> 12,Mg, Magnesium
=>10, Ne, Neon
=>18, Ar, Argon
=>24, Cr, chromium
Explanation:
The atomic number is the number of protons in the nucleus of an atom. The number of protons define the identity of an element (i.e., an element with 6 protons is a carbon atom, no matter how many neutrons may be present).
Hope it's helful uh dani di how r uh aap baat ni marte ab
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