According to Mendeleev 39 s periodic table which unknown element of group III had an atomic mass of ...........

General Science (CHSL) Chemistry

According to Mendeleev's periodic table, which unknown element of group III had an atomic mass of 68 that was later replaced

by gallium?

This questions was previously asked in

SSC CHSL 10th June 2022 Shift-2

Eka-aluminium

Eka-manganese

Eka-boron

Eka-silicon

- Mendeleev predicted the existence of several elements and named them with the prefix "eka-" based on their position in his periodic table.

- Eka-aluminium: Mendeleev predicted this element in group III with an atomic mass of about 68. It was later discovered and named gallium.

- Eka-manganese: Mendeleev's prediction that corresponded to the element later identified as technetium.

- Eka-boron: Predicted element that was later found as scandium.

- Eka-silicon: Referred to an element that was later discovered as germanium.

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