Use the periodic table to correctly describe the arrangement of electrons in an oxygen atom. Check all of the
boxes that apply.
The electron configuration is 1s22s22p2
The electron configuration is 1s22s22p4
The electron configuration is 2s22p6
There are valence electrons in the 1s- 2s- and 2p-orbitals.
There are valence electrons in the 2s- and 2p-orbitals.
There are valence electrons in the 2p-orbitals only.

sorry idk the answer well to you i have a explaination

explanation: a formula which shows the arrangement of atoms in the molecule of a compound

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

i think its 5049.

i hope this !

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.