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Sagot :
Answer:
Explanation:
1) Silicon (Si) is element with atomic number 14 (14 protons and 14 electrons).
Electron configuration of silicon atom:
₁₄Si 1s² 2s² 2p⁶ 3s² 3p² or [Ne] 3s² 3p², neon (Ne) is noble gas with atomic number 10.
2) Francium (Fr) is element with atomic number 87 (87 protons and 87 electrons).
Electron configuration of francium atom:
₈₇Fr 1s²2s²2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁶ 4f¹⁴ 5d¹⁰ 6s² 6p⁶ 7s¹ or [Rn] 7s¹, radon (Rn) is noble gas with atomic number 86.
3) Mercury (Hg) is element with atomic number 80 (80 protons and 80 electrons).
Electron configuration of mercury atom:
₈₀Hg 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶ 4d¹⁰ 5s² 5p⁶ 4f¹⁴ 5d¹⁰ 6s² or [Xe] 4f¹⁴ 5d¹⁰ 6s², xenon (Xe) is noble gas with atomic number 54.
4) Vanadium (V) is element with atomic number 23 (23 protons and 23 electrons).
Electron configuration of vanadium atom:
₂₃V 1s² 2s² 2p⁶ 3s² 3p⁶ 3d³ 4s² or [Ar] 3d³ 4s², argon (Ar) is noble gas with atomic number 54.
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