The phrase "are the same element" is correct and usable in written English.
It can be used when discussing items or concepts that share identical characteristics or qualities.
Example: "In this experiment, we found that the two compounds are the same element, which explains their similar properties."
Alternatives: "are identical" or "are one and the same".
It's the same element of control over people as, say, Walt Disney.
After considerable controversy it was decided that columbium and niobium were the same element.
"It's the same element who voted for Putin, supported Brexit, back Erdoğan and who will vote for Trump.
"There's the same element of fear," said Mr. Clayton, 79. "In the 1970s, it was a physical, personal fear.
Niobium was later proved to be the same element as columbium, and niobium was accepted as the official name by the International Union of Pure and Applied Chemistry in 1950.
The second syllable of toro 'street' is the same element as the first syllable of nosang 'on the street' (which is spelled with an n- in South Korea but with an r- in North Korea).
What made the scene unwatchable is the same element that inspires me to recommend it: the way the gore laced with the nausea (inspired by the fiendishness of the dramatic device of the implant) probed pain and destruction so exactly as to feel invasive.
"People have mentioned that, yeah, but it would be presumptuous of me to draw any parallel," Mr. Gyllenhaal said, but there is the same element of coming of age and being confused and on top of that being burdened with the death of a loved one.
After Friedrich Wöhler confirmed these results, it was thought that columbium and tantalum were the same element.
In 1864 and 1865, a series of scientific findings clarified that niobium and columbium were the same element (as distinguished from tantalum), and for a century both names were used interchangeably.
