By examining electron domain geometry, one can determine that the ammonia molecule (NH3) has O one sp2 orbital.
two sp’ orbitals.
O three sp orbitals.
O four sp orbitals,

Tin has ten stable isotopes. the heaviest, 124sn, makes up 5.80% of naturally occuring tin atoms. how many atoms of 124sn are present in 82.0 g of naturally occurring tin? what is the total mass of the 124sn atoms in this sample?

How have the greenhouse gasses increased from the year 2000 to 2018

How are isotopes of the same element alike?