English translation for eka-tantalum and usage examples from the best sources

For a long time chemists searched for eka-tantalum as an element with similar chemical properties to tantalum, making a discovery of protactinium nearly impossible.

This arrangement placed protactinium below tantalum, uranium below tungsten, and further suggested that element 93, at that point referred to as eka-rhenium, should be similar to the group 7 elements, including manganese and rhenium.

Tantalum, Wrought, And Articles Of Tantalum, N.E.S.

Tantalum Tantalum is a crucial ingredient in electronics manufacturing.

"God, no!" Mr. Ekas said.

Making tantalum is similarly onerous.

Tantalum comes from an ore called coltan.

Examples are tungsten, molybdenum, tantalum, and beryllium.

Titanium and tantalum are not so obliging.

Only gold and tantalum are of significance.

So where does this leave Mr. Ekas of Oregon?