Can you answer these science questions? thank you

1. Why did Mendeleev leave three blank spaces in his periodic table? 2. Why do elements in a group of the periodic table have similar properties? 3. List five differet metals give examples of how each metal is used. 4. List five different nonmetals. Give examples of how each nonmetal is used. 5. Why woukd you expect to find the element argon in its pure, uncombined form in nature? 6. An atom contains 74 protons, 74 electrons, and 108 neutrons. Which element is it? 7. Why can two different elements have similar atomic masses? TRUE OR FALSE 1. The particles that move around outside an atom's nucleus are electrons. 2. Dmitri Mendeleev is credited with developing the first periodic ta... click for more

Clinical Chemistry 3 algoritms

1. Create an algoritm to distinguish the various forms of interference in a chem 7 profile. Include Lipemia, icterus, hemolysis, mishandling and various anticoagulants. The Chem 7 profile includes: Na (Sodium) K+ (potassuim) CL (chloride) Glucose, Creatinine, BUN (Blood urea nitrogen) and Anion Gap. This question is asking what would happen to theses results if the sample was lipemic, or hemolysized etc. 2. Create an algorithm using available tests to distinguish the various myeloproliferative and lymphoproliferative disorders. Include in order from basic to advanced. you should include initial tests, stains, genetics and cell surface markers. 3. create an algoritm which wil all... click for more

What is the structure and chemical formula of chlorophyll?

What is the chemistry behind the green colour of plants? What actually is the structure and chemical formula of chlorophyll?

What is the role of cholorophyll in plants?

Why do green plants need cholorophyll for photosynthesis? How is solar energy coverted to chemical energy in plants?

You dissolve 12.6352 g of potassium iodide in water and bring the volume of solution to 250.0 ml

#1 You dissolve 12.6352 g of potassium iodide in water and bring the volume of solution to 250.0 ml. What is the molar concentration of KI? #2 What volume of 0.0436 molar hydrochloric acid is required to react with 30.0 ml of 0.0278 molar LiOH? #3 An AM radio station broadcasts using electromagnetic radiation at 1490 kilohertz. What is the wave length of this radiation in meters? #4 Using the Bohr equation for the hydrogen atom calculate the ionization energy for hydrogen. #5 Give the electron configuration of each of the following atoms using the inert gas notation. (a) K (b) Mn #6 Give the set of four quantum numbers that describe the last electron to be placed in the ... click for more