The average of the masses the neutrally occurring isotopes in element

Explain what happens at the saturation point when adding salt to water at room temperature.

Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.

What structural formula represents 4 electrons shared between two atoms?