The time when the embryo develops inside the mother is called the gestation period. true or false

An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity ?

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?

1) which of the following is the best example of a physical change? a) sugar dissolving in tea b) firefly glowing 2) in the combustion of ethane, what is/are the reactants? c2h6 + o2 ==> co2 + h2o a) c2h6 and o2 b) co2 and c2h6