An atom or ion has 16 protons, 15 neutrons, and 17 electrons. Is it positive, negative, or neutral? Why? What element is it?
I really need help on this so can someone tell me the answer please!

This line graph compares the growth of plants that were kept in the sun for different amounts of time.a)  on day 7, the plants kept in the sun for 3 hours were how tall? b)  on day 7, the plants kept in the sun for 6 hours were how tall? c)    on day 10, the plants kept in the sun for 9 hours were how tall? d)  on day 11, the plant that was grown with 1 hour of sunlight was how tall? e)  based on the graph, the plant grows best in what amount of sunlight?

Determine the wavelength of the light absorbed when an electron in a hydrogen atom makes a transition from an orbital in the n=3 level to an orbital in the n=7 level.

Asap! how do you lengthen a pattern piece? (family and consumer science, sewing)