And active alkaline earth Metal with 56 protons

A lithium atom has an atomic number of 3 and a mass of 7. The number of electrons which it has in the 1st shell (principal energy level) is?

Which of the following represents the chemical reaction of hydrazine and hydrogen peroxide to produce nitrogen and water?

Under which of the following sets of conditions will a sample of a real gas deviate most from ideal behavior? a. strong interparticle attractions, low temperature, high pressure b. strong interparticle attractions, high temperature, high pressure c.

Which of the following describes how electric charges flow? Question 10 options: They do not flow They flow from low potential to high potential They flow from high potential to low potential They flow when towards the source

Determine the number of molecules present in 4.56 moles of nitrogen (n2).

Which of the following actions will not increase the rate at which a solid dissolves in a liquid? A. increasing the surface area of a solid B. stirring the solid and the liquid C. increasing the amount of the solid D.

Does the amount of heat absorbed as 1 kg of saturated liquid water boils at 100°C have to be equal to the amount of heat released as 1 kg of saturated water vapor condenses at 100°C?

F. Protection of the body from infectious organisms is accomplished by which of these tissues? a) bone; b) muscle; c) nerve; d) blood

A compound that is composed of molybdenum (Mo) and oxygen (O) was produced in a lab by heating molybdenum over a Bunsen burner. The following data was collected: Mass of crucible: 38.26 g Mass of crucible and molybdenum: 39.

Which of the following elements has electrons in the 3d sublevel?