Problem: The prefix eka- comes from the Sanskrit word for one. Mendeleev used this prefix to indicate that the unknown element was one place away from the known element that followed the prefix. For example, eka-silicon, which we now call germanium, is one element below silicon. Mendeleev also predicted the existence of eka-manganese,  which was not experimentally confirmed until 1937 because this element is radioactive and does not occur in nature.Based on the periodic table, what do we now call the element Mendeleev called eka-manganese?

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We have to determine which radioactive element was called eka-manganese prior to 1937.

As mentioned in the problem, the prefix eka is used for elements which are one place away from the element with which the prefix is used.


For example, eka-silicon is actually germanium.

To solve this problem, we will have a look at the periodic table to find out which radioactive element is next to manganese (Mn).

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Problem Details

The prefix eka- comes from the Sanskrit word for one. Mendeleev used this prefix to indicate that the unknown element was one place away from the known element that followed the prefix. For example, eka-silicon, which we now call germanium, is one element below silicon. Mendeleev also predicted the existence of eka-manganese,  which was not experimentally confirmed until 1937 because this element is radioactive and does not occur in nature.

Based on the periodic table, what do we now call the element Mendeleev called eka-manganese?

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