Chlorine has 7 outer energy level electrons and argon has 8. what is the difference in the reactivity of these two elements?

How are metallic bonds different from ionic and covalent bonds?

What word from the periodic table of elements is found in groups 3-12; these are fairly stable metals that either react slowly with or do not react with water and air; includes metals such as gold, nickel, and copper?

Radio waves have a. low frequency and long wavelength b. low frequency and short wavelength c. high frequency and long wavelength d. high frequency and short wavelength

The sum of the numbers of protons and neutrons in a nucleus of an atom answer

An unknown element is shiny and is found to be a good conductor of electricity, what other properties would you predict for it

What do dipole-dipole forces do? A. Replace covalent bonds with hydrogen bonds B. Turn nonpolar molecules into solids C. Hold polar molecules together D. Hold nonpolar molecules together

As the moon revolves around earth, it also rotates on its axis. Why is it that the same side of the moon is always visible from earth

The SI unit for quantity of radioactive materials is:

If you choose to wear loose clothing, large or dangling jewelry, or contact lenses to lab, which of the following statements best represents how you should proceed? A.

Which of these elements exists as a solid at room temp and pressure? Chlorine, bromine and iodine. Why?