Which of these elements
has and atom with the most stable outer electron configuration (ne, ca, cl, na)

A. Ne ( Neon)

Explanation:

Neon has 8 valence electrons.  This is known as the stable octet.  All the Noble Gases, Group 18, have stable outer electron configurations.  

the leaf is an organ of a typical plant, and the main functions are to complete photosynthesis and allow the plant to exchange gas, just like how we have the respiratory system. leaves have the stomata, which collects maintains co2 and o2 levels. this is necessary for cell metabolism. the leaf also collects sunlight using chloroplasts. succinctly, leaves own a pivotal role in sustaining plant life.

the food using pesticides in the future will harm you by giving you diseases like cancer or something since they have things that we should not eat in it like chemicals or pesticides. that is why organic food is more expensive because they take the time to make it right and healthy for you to eat.

explanation: