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2
Answer:
Block chemistry
Explanation:
1) 1s² 2 s¹ => alkali metals
2) 1s² 2s² 2p⁶ 3s² 3p⁵ => halogen family
3) 4s² 3d² => transition elements
4) 1s² 2s² 2p⁶ => noble gases
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1
Answer:
A B
1s²2s^1 - Alkali Metal
1s²2s²2p^63s²3p^5 - Halogen Family
1s²2s²2p^63s²3p^64s²3d² - Transition Elements
1s²2s²2p^6 - Noble Gas
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