Identify the atom with the following orbital-filling diagram. 1s² 2s² 2p 3s² 3p6 ↓↑ 4s UTUTUTUTUT 3d Express your answer as a chemical symbol. 4p

Elemental sulfur is a yellow solid that consists of S8 molecules. The structure of the S8 molecule is a puckered, eightmemberedring (see Figure 7.27). Heating elemental sulfur to high temperatures produces gaseous S2 molecules:S8(s)---->4 S2(g)(a) The electron configuration of which period 2 element is most similar to that of sulfur? (b) Use the VSEPR model to predictthe S¬S¬S bond angles in S8 and the hybridization at S in S8. (c) Use MO theory to predict the sulfur–sulfur bondorder in S2. Do you expect this molecule to be diamagnetic or paramagnetic? (d) Use average bond enthalpies (Table 8.3) toestimate the enthalpy change for this reaction. Is the reaction exothermic or endothermic?

Please provide the chemical symbol for the element with the following electron configuration.                                 1s2 2s2 2p6 3s1

The definition of electron affinity corresponds to the energy associated with the generic process of: X(g) + 1eX(g) Which element has atoms with the most exothermic electron affinity? Br Ge Si