1. Equal
2. Properties
3. Heat
4. Reverse
The answer is c electrostatic repulsion between nuclei
Answer: There are
molecules in 63.00 g of 
Explanation:
According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number
of particles.
To calculate the moles, we use the equation:

1 mole of
contains =
molecules
Thus 3.5 moles of
contains =
molecules.
There are
molecules in 63.00 g of 
A. plate tectonics slowly move in what is called Continental Drift, the Earth used to be one continent called Pangea and has shifted ever since.
Answer:
Helium
Explanation:
The first ionization energy varies in a predictable way across the periodic table.