Non-renewable resources, such as coal, produce harmful gasses, such as carbon monoxide, polluting the air and decreasing air quality.
Answer:
the answer is c I believe
As you go down a group the atomic radius increases and so does the number of electron shells added to an atom.
Electrons located in the outermost shell of an atom are called valence electrons. The outermost electrons are involved in chemical reactions. The electrons in the outer shell determine the reactivity of the element. For example, potassium (2,8,8,1) has one valence electron.
