The number of valence electrons an element has changes often, so we cannot use the periodic table to predict the number of valence electrons an element has
True
False

False

Explanation:

The number of valence electrons on an element is also the same or else it would be a different element.

stratosphere: as the altitude increases, the air temperature increases. the stratosphere has a layer of ozone, called the ozone layer. this layer absorbs most of the ultraviolet radiation from sunlight. this results in the stratosphere being warmer.

the match lol