Explain how to write the abbreviated electron configuration for selenium (Se), and provide the correct abbreviated electron configuration.
You can submit your answer in a format that does not require superscripts.
For example, 1s22s22p (neon) can be entered as 152, 252, 2p6.

Why are the trends and exceptions to the trends in ionization energy observed?

The covalent compound acetylene, which is the fuel of the oxyacetylene torch used by welders, has the molecular formula c2h2. the covalent compound benzene, a commercial solvent, has the molecular formula c6h6 each of these covalent compounds contains carbon and hydrogen atoms in a one-to-one ratio. would it be correct to write the chemical formulas of each as ch? explain.

Which of the following natural processes is most likely to support the formation of an underwater sinkhole? a pollution buildup from deposited minerals b limestone cave collapsing due to changes in sea level c erosion of large amounts of sand moved by ocean waves d oxidation of rock formed by chemical weathering