Which of the following are descriptive of the neutral atom with the electron configuration of 1s22s22p3? Select all that apply.

It is in its ground state.
It is an atom of nitrogen.
Its electron configuration can also be written [Ne]2p 3.
It has 3 electrons in its highest energy sublevel.
It has 3 electrons in an excited state.

Order the following from smallest to largest atom, electron, quark, proton, neutron, molecule, nucleus

The scheme below is from a series of reactions that are part of a synthesis of vitamin a. answer the following questions with reference to this scheme. (i) what is "reagent a"? (ii) draw a step-by-step mechanism which explains the formation of compound c from compound b (iii) which reagents would you use to form compound e from compounds c and d (reagents b and c)? for each reagent suggested above in (ii) explain the role of the reagent in the reaction to (iv) form compound e. you may wish to do this by drawing a mechanism. 1. addition of reagent a но reagent a 2. н,о" thо oh нон-с compound a. compound b. compound c .ch-оh 1. reagent b "сно 2. reagent c сh oh compound e. compound d.

At 20°c, a sample of h2o liquid and a sample of co2 gas each have the same average kinetic energy. why is one a liquid and the other a gas at this temperature?