What is the most stable monatomic ion formed from iodine? for correct answer !

Which element is the least metallic between cadmium, silver, zinc, or iron?

Achemistry student weighs out 0.306 g of citric acid (h3c6h5o7), a triprotic acid, into a 250 ml volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with 0.1000 m naoh solution. calculate the volume of naoh solution the student will need to add to reach the final equivalence point. be sure your answer has the correct number of significant digits.

Who discovered a pattern to the elements in 1869?