What chemical is added to natural gas in case of gas leaks?

State Hund's rule. Choose one: A. An attraction between two electrons occurs due to vibrations in the crystal lattice. B. Each electron goes into the lowest-energy orbital available. C.

you go out to dinner and the bill comes to $35.51. how much should you tip if you want the tip to be 20.0% of the bill?

Our body needs iron. Certain foods are rich in iron and iron tablets are usually recommended by doctors. but neither the food nor tablets are hard like iron? Why?

How do i make a friend?

Which particles that make up an atom are involved in nuclear reactions? protons only protons and neutrons electrons only electrons and neutrons

A covalent bond is best described as Question 1 options: the sharing of electrons between atoms. the transfer of electrons. a bond between a metal and a nonmetal. a bond between a metal and a polyatomic ion.

From the list below, choose which groups are part of the periodic table

Gypsum is a mineral that is used in the construction industry to make drywall (sheetrock). The chemical formula for this hydrated compound is CaS04 • 2H20. A hydrated compound contains water molecules within its crystalline structure.

What is plasma from which clotting factors have been removed called?

Genetic evidence supports which of the following explanations for the presence of 13 different finch species on the Galápagos Islands? A.