Which among the following pairs are not isotopes?​

For the following, determine the type of reaction and then give products.

When determining the shape of a molecule, it is important to draw a lewis dot structure first in order to see the total number a. electrons within the moleculeb. bonding and unshared pairs around central atomc. unshared pair within the molecule( i really need it )

How heavy is thanos? a) 3000 lbs b) all of it c) the price of tea in china d) heavy enough