Classify the following as an acid or base using the arrhenius definition of an acid or base. hno3 is an arrhenius and increases the concentration of when added to water. koh is an arrhenius and increases the concentration of when added to water. ca(oh) 2 is an arrhenius and increases the concentration of when added to water. h2so4 is an arrhenius and increases the concentration of when added to water.

the electronic configuration of an atom with eight electrons is 1s²2s²2p⁴. the orbital diagrams are shown in the figure.

as per the hunds rule:

1. electrons tend to avoid being in the same orbital as per as practicable.

2. electrons in different orbitals of the same energy will have their spin parallel.

this can be illustrated from the multiplicity of the orbitals of the atom. as there are four electrons in the p orbital and p orbital has 3 sub-shells. the electrons can be fed in different ways as shown in the figure but the correct orbital diagram will be as per the hunds rule.

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.