How do you know how many shells of electrons an element has, and how do you find out on the periodic table?

If a light ray strikes a flat mirror at an angle of 27 degrees, what will the reflected ray be?

Which of the following does not describe elements? A. They are uniform throughout. B. They can be separated by a chemical reaction. C. They cannot be separated by physical means. D. They are listed on the periodic table.

Measurements of water quality were taken from a river downstream from an abandoned chemical dumpsite. Concentrations of a certain chemical were obtained from 9 measurements taken at the surface of the water, 9 measurements taken at mid-depth of the

Which of the following challenges poses the biggest problem to the long term use of alternative fuels

Its atom contains 50 electrons and 70 neutrons

What type of reaction happens in a nuclear power plant?

C6H12O6 + O2 > CO2 + H2O

In the current model of the atom, ___. electrons and protons are mixed together in a solid sphere electrons orbit around the positively charged nucleus in set patterns called orbitals electrons travel as waves in the electron cloud that surrounds

What information could you use to determine the atomic number of an unknown element that has a mass number of 22? O A. number of ions B. number of isotopes C. number of neutrons O D. number of electrons

Why organizing elements in increasing mass numbers would be rejected as a form of the periodic table?