lutetium

"$ is the symbol for dollars in the US and some other countries."

"The teacher determined the rules for the classroom project, setting clear limits on the length of presentations. "

"Letters are the elements of written language."

"The printed circuit board's manufacturing process relies heavily on photo resists to protect specific areas during etching. "

"the resistance of bacteria to certain antibiotics"

"The box contained old photographs. "

"The fish flashed its silvery scales as it jumped out of the water. "

"The scientist analyzed the data to find a solution. "

"The bank's website uses an atomic operation to update account balances. "

"The rust on the old car is a clear sign of corrosion. "

"The scientist studied the effects of different types of soil on plant growth. "

"The scientist studied the chemical composition of the soil sample. "