Atomic Number
Atomic
Mass
Protons
Element
Electrons Neutrons
Oxygen
53
75
2. a.) Compare/contrast the Bohr model and the Quantum mechanical model: (What are the differences and similarities in
structure and theory?)
b.) Which model is more accurate? Why?
d orbital?
3. How many electrons can fit in a p orbital? s orbital? f orbital?
4. What does the big number in the electron configuration represent?
5. What does the small letter in the electron configuration represent?
6. What does the exponent in the electron configuration represent?
7. How many electrons does Carbon have?
8. Write the electron configuration for Carbon (C):
9. How many electrons does Sodium have?
10. Write the electron configuration for Sodium(Na):
11. How many electrons does Neon have?
12. Write the electron configuration for Neon(Ne):_
13. a) What is wrong with the following electron configuration for Carbon? 1s21p4
b) Write the correct electron configuration for Carbon:
14. a) What is wrong with the following electron configuration for Selenium? 1s22s22p63s23p64s24p4
b) Write the correct electron configuration for Selenium:
15. Match the correct electron configuration to the correct element:
Potassium
1s22s22p63s23p6
Phosphorous 1s22s22p63s23p64s1
Bromine
1s22s22p63s23p3
Argon
1s22s22p63s23p64s23d104p5

according to the u.s. department of agriculture, the label of "certified organic" comes with a set of highly regulated standards for environmental stewardship and resource conservation. some of these include maintenance and improvement of soil quality, prevention of ground and surface water contamination, greenhouse gas regulation, encouragement of biodiversity and conservation of water and energy (see references 1). organic practices integrate natural methods such as mulching, plant diversity, native and adapted plants, crop rotation and the introduction of beneficial insects to control pests without synthetic pesticides.

environmental implications of pesticides

synthetic pesticides ensure high crop yields. while effective in achieving this goal, pesticides contaminate soil, air, ground and surface water, as well as the plants and animals that come into contact with these contaminated sources. freshwater and marine organisms are particularly susceptible to pesticides through agricultural runoff. pesticides also reduce soil fertility (necessitating the use of synthetic fertilizers) and can travel far from the original source, contaminating water and air hundreds of miles from the location of application (see references 2).

health implications of organics

although a subject of particular debate, many recent findings show that organic food is healthier than conventionally grown food. according to the usda, an extensive european union-funded study found that organically grown foods contain more beneficial compounds, such as the vitamins and antioxidants needed to combat many diseases (see references 5). organic milk, meat and eggs are regulated to ensure they are free of hormones administered to conventional livestock and poultry.

health implications of pesticides

pesticides affect human health in three ways: through skin contact, inhalation and ingestion. acute and long-term exposure to pesticides can cause serious health problems for farmers who apply them. the majority of other people are affected by drinking contaminated water and eating contaminated marine life (see references 3). pesticides have been linked to neurological disorders, endocrine and reproductive disorders, immune system deficiencies and cancer. according to the world health organization, acute pesticide poisoning (app) is responsible for significant annual mortality, especially in developing nations (see references 4).

other important considerations

not every small farm or business owner can afford the costly certification process required to be considered "certified organic," even if the farm is not using chemicals. "transitional" farms include those that once used chemicals and are now transitioning to organic-only production. in addition, though organic farming methods offer obvious environmental benefit, an organic apple shipped from around the world creates a different set of environmental problems. locally grown food (particularly locally grown, organic food) is key in sustainable food production.