a b c arethree elements having atomic number 2 10 and 5 respectively state which have these elements belong to same period and simple giving reasons for your answer

What volume of a 2.00 m stock solution of naoh is needed to prepare 150. ml of 0.40 m solution?

Identify one disadvantage to each of the following models of electron configuration: -dot structures -arrow and line diagrams -written electron configurations type in your answer below. (answer) -dot structures do not show the distribution of electrons in orbitals and take up a lot of space. -arrow and line diagrams take up a lot of space and make it difficult to count electrons. -written configurations make it easy to lose count of electrons and do not show the distribution of electrons in orbitals.

What is the molar mass of a gas that has density of 2.054 g/l