The atomic mass unit is defined as 1/12 of the mass of a carbon 12 atom, and 1 atomic mass unit has a mass of 1.6605 x 10⁻²⁴ g. It follows that one carbon atom has a mass of 12 x 1.6605 x 10⁻²⁴ and thus the number of carbon atoms in present in 12 g of carbon equal 12 / (12 x 1.6605 x 10⁻²⁴) which equals 6.02 x 10²³.True / False.

Select the correct answer. which phrase correctly describes temperature? o a. average rotational kinetic energy of the particles in an object o b. average energy of the particles in an object c. average translational kinetic energy of the particles in an object od. all energy possessed by the particles in an object

Darla claims that the first periodic table developed by mendeleev was not completely accurate, so it is not useful at all. harmony argues that it establish the periodic table we use today, making it more credible. who is correct and why? darla is correct, because a model that has any mistakes should be thrown out. darla is correct, because a good model would not need to change. harmony is correct, because mendeleev’s model had all of the information correct in the first version. harmony is correct, because mendeleev’s model made predictions that came true.

Which of the following is not true about the atomic model of substances?