If an atom has 7 electrons how many of them will be in the 2nd level

Ingle-replacement reactions can take place with nonmetals. For this question, assume that A and C are nonmetals and B is a metal. Which general equation shows one nonmetal replacing another nonmetal in a compound?

A student labeled 5 tubes 0, 1, 2, 3, 4, 5. Tube 0 contained undiluted protein lysate. The student used the tube 0 lysate to prepared 10-fold serial dilutions in the tubes labeled 1-5. What is the dilution of each of the tubes?

What is the difference the sizes of planets and their distances from the sun

Why do some objects such as windows and doors close in the winter but can be harder to close in the summer?

Which of the following are indicators of a chemical change?

A piece of solid carbon dioxide, with a mass of 21.0 g, is placed in an otherwise empty 4.60 L container at 25°C. What is the pressure in the container after all the carbon dioxide vaporizes?

What is the volume of 1 mile of gas at a standard temperature and pressure

Next to each formula, write the number of atoms of each element found in one unit of the compound

A particular atom has 58 protons and 82 neutrons. what are the atomic number, mass number, and periodic table symbol of this isotope?

Chemicals that are able to reduce activation energy in a reaction and speed the reaction rate are a. inhibitors. b. reactants. c. products. d. catalysts.