63EU and 70Yb show 2 + oxidation state.

1.	63EU and 70Yb show 2 + oxidation state.
Answer» ₆₃EU has electronic configuration, [Xe] 4f⁷ 5d°6s². By losing 2 electrons from 6s orbital, it acquires stable configuration and 4f-orbital is half-filled. ₇₀Yb has electronic configuration, [Xe] 4f¹⁴5d° 6s². By losing 2 electrons from 6 s orbital, it acquires stable configuration and 4-orbital is completely filled. Hence Eu and Yb show 2 + oxidation states.

Answer»

₆₃EU has electronic configuration, [Xe] 4f⁷ 5d°6s². By losing 2 electrons from 6s orbital, it acquires stable configuration and 4f-orbital is half-filled.

₇₀Yb has electronic configuration, [Xe] 4f¹⁴5d° 6s². By losing 2 electrons from 6 s orbital, it acquires stable configuration and 4-orbital is completely filled.

Hence Eu and Yb show 2 + oxidation states.

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63EU and 70Yb show 2 + oxidation state.

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