(a) write the ground state electron configuration for an arsenic atom, showing the number of electrons in each subshell
(b) give one permissible set of four quantum numbers for each of the outermost electrons in a single as atom when it is in its ground state.
(c) is an isolated arsenic atom in the ground state paramagnetic or diamagnetic? explain briefly.
(d) explain how the electron configuration of the arsenic atom in the ground state is consistent with the existence of the following known compounds: na3as, ascl3, and asf5. 978 d

Paramagnetic

Explanation:

The details of the answers to the questions are written in the image attached.

Arsenic is in group fifteen having a valency of 3 or 5 depending on the number of valence electrons used in bond formation. All the electrons have the same spin in obedience to Hunds rule. The 4s electrons are lone pairs localized on the arsenic atom which could sometimes also participate in bonding.

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.

the maximum mass of nh3 is nh3 in grams