Which elements consists of a metal a matalloid and a noble gas
1) aluminum, sulfur, argon
2) magnesium, sodium, sulfur
3)sodium, silicon, argon
4)silicon, phosphorus, chlorine

Stage in which a star’s outer layers have started to cool and grow outward?

Sodium nitrite (nano2) reacted with 2−iodooctane to give a mixture of two constitutionally isomeric compounds of molecular formula c8h17no2 in a combined yield of 88%. draw reasonable structures for these two isomers. click the "draw structure" button to launch the drawing utility. place the two compounds in the appropriate boxes below.

Tell me the iupac name of the following compounds: