(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.

in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

explanation:

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.