What is this element 1s22s22p6?

How many protons are in an ion with 36 electrons and a - 1 charge?

A sample of carbon-12 has a mass of 6.00 g. How many atoms of carbon-12 are in the sample?

Why do elements in the same group have a similar reactivity?

The nitrogen oxide (NO) molecule has a bond length of 140 pm. Calculate the dipole moment, in Debyes, that results if the charges on N and O were 2 and 2-, respectively. (Include the formula for the calculation in your solution)

Which of the following agencies provide research funding that is not federally financed? A. Department of Energy B. National Institute of Health C. National Science Foundation D. American Diabetes Association Choose all that apply

Of the following, which is most likely to result after a farmer sprays his crops with pesticides? A. The crops die. B. The insect population increases. C. The soil dries up and blows away. D. A neighbor's well tests positive for pesticides.

How many liters does the following number of atoms of helium take up? 9.42x10^22 atoms He

Why isn't biuret reagent required for determining the absorption spectrum of hemoglobin?

During which phase change does the arrangement of water molecules become more orderly A.) melting B.) subliming C.) boiling D.) condensing

What's the difference between Mixture and Solution?