The valency of nitrogen is 3, clarify it.

Sophia and her friend Nora have the same unknown solid. Sophia has progressed a little faster with the purification process, but now she is standing around twiddling her thumbs because no crystals are forming, even over an ice bath.

This form of matter has no definite shape but it has volume. A. Liquid B. Gas and Liquid C. Solid E. Solid D. Liquid and Solid F. Gas

What would seasons be like if there was no tilt?

Why is RNA chemically unstable?

Which of the following is a product in the following reaction (glucose+fructose->sucrose + H2o/water)

Why does the effective nuclear charge increase across a row of the periodic table?

Iodine-131 decays to form xenon-131. the half-life of this reaction is 8.07 days. from a 200-g sample of iodine-131, how much of the sample is xenon-131 after 16.14 days?

Complete the following statement by checking all that apply Creativity allows scientists to develop multiple approaches to solving problems. adapt to changes in scientific knowledge. look at old problems in new ways.

The atomic weight of hydrogen is 1.00794. a. True b. False

Describe What kind of ions do metals form? What kind of ions do nonmetals form?