91Ó°ÊÓ

Suppose you could see into solid objects at the atomic level. Explain, based on what you see, why solid NaCl would not be called a molecular substance whereas solid \(\mathrm{H}_{2} \mathrm{O}\) would.

What common diatomic molecules exist in our atmosphere? What triatomic molecules exist in our atmosphere? Give the formulas for all your answers.

Can a molecule also be an elemental substance? If so, give some examples.

The attractive force between atoms that results from the sharing of two valence electrons between those atoms has a special name. What is it?

In terms of energy, why is an \(\mathrm{H}_{2}\) molecule more stable than two isolated \(\mathrm{H}\) atoms?

In terms of interaction between the atoms, why is an \(\mathrm{H}_{2}\) molecule more stable than two isolated H atoms?

Is energy released or absorbed when a covalent bond forms between two atoms?

A student decides to boil water to produce hydrogen gas and oxygen gas. Will this work? Explain your answer.

What do we mean by "double-counting" when it comes to counting the electrons around an atom in a molecule?

How many electrons does an atom gain for ea covalent bond that it forms in a molecule?