How do you find the atomic radius of an element

You are performing an experiment in a lab to attempt a new method of producing pure elements from compounds. the only problem is that you do not know what element will form. by your previous calculations you know that you will have 6.3 moles of product. when it is complete, you weigh it and determine you have 604.4 grams. what element have you produced?

What are the trends and exceptions to the trends in electron affinity?

Distilled water is a completely neutral solution. what is its ph? a. 1 b. 7 c. 14 d. 0