What is true about the elements that are in the same group? They will contain the same number of protons.
They will have the same atomic mass.
They will emit X-rays of similar frequency.
They will display similar chemical and physical properties.

A1.5l container holds p.50 grams of an unknown gas at a pressure of 0.44 atm and a temperature of 50.c what is the molar mass of the unknown gas

The empirical formula of a compound is ch2o and its mass is 120 amu/molecule, what is its formula?

An engineer decides to use a slightly weaker material rather than a stronger material, since she knows that the stronger material can break suddenly. this is an example of what? a choosing a material that will show warning before it fails b using composite materials that combine strength c using a material for multiple applications d using design techniques that increase efficiency and reduce cost