Atomic Theory and Bonding

Question 1

Which are stronger and why? Single bonds, double bonds or triple bonds?

Answer 1

Triple bonds are STRONGEST and SHORTEST due to having MORE electrons involved in the bonds which creates a GREATER FORCE OF ATTRACTION

Question 2

Why do some molecules have stronger dispersion forces than others?

Answer 2

Dispersion bond strength relies on the size/shape of the molecule. The BIGGER the molecule (lower in the periodic table), the MORE electrons it will have which creates a GREATER FORCE OF ATTRACTION (more negative) and therefore will STRONGLY attract positive atoms

Question 3

Bonds between molecules

Answer 3

Intermolecular bonds (Hydrogen bonds, dipole-dipole, dispersion forces)

Question 4

Bonds within molecules

Answer 4

Intramolecular bonds

Question 5

What influences the state of a molecule at room temp?

Answer 5

Intermolecular bonds determine the state at room temp. Hydrogen > Dipole-dipole > dispersion forces. However with dispersion forces, the no. of electrons determine the BP - the more electrons, the stronger the force of attraction.

Question 6

How does a substance decompose?

Answer 6

If a substance decomposes, it means that the intramolecular forces have broken (Water becomes Hydrogen and Oxygen)