The phrase "a weak element in" is correct and usable in written English.
It can be used to describe a part of a system, argument, or structure that lacks strength or effectiveness.
Example: "The report highlighted a weak element in the company's strategy that needed to be addressed for better performance."
Alternatives: "a vulnerable aspect of" or "a fragile component in".
But they also point up what is possibly the only weak element in this otherwise sturdily built novel -- namely, the portrayal of Ginger as the person she was before her decline.
Fenestration has always been regarded as the weak element in the building envelope due to its role in determining of the energy balance of a building.
This segment includes all patients who consider the staff the weak element in the services.
Far from being the weakest element in a Mars mission, humans would be the strongest, as was demonstrated during Hubble Space Telescope repair missions, the assembly of the International Space Station, and countless other space flights.
The lifetime is correlated with the deterioration characteristics of the weakest element in an ac PDP.
An all-star cast (for 1966, at least — Ann-Margret, Red Buttons, Mike Connors, Bing Crosby, Robert Cummings, Van Heflin, Slim Pickens, Stefanie Powers) faces an apocalyptic threat (provided in "Stagecoach" by some uncharacterized Indians, the weakest element in both movies) while trapped within a restricted environment, much like the casts of "The Poseidon Adventure" and "The Towering Inferno".
Pairing his critique of central planning with a defence of free markets, Hayek became a sophisticated evolutionary economist whose advocacy of markets drew attention to the weakest element in mainstream economics: the assumption that economic agents are always perfectly informed of alternative opportunities.
Surprisingly, the weakest element in the book is its handling of Stalin.
"I thought it was the weakest element in the book," said Mr. Meyer, "and more balls than I could keep up in the air".
