What element has 81 protons in the nuclei of its atoms?

A. Platinum

B. Uranium

C. Lead

D. Thallium

What does the term organic mean in chemistry? natural containing carbon using no pesticides within the periodic table

According to the nebular hypothesis, our solar system formed from a huge rotating cloud made mostly of a. carbon and hydrogen. b. helium and hydrogen. c. oxygen and helium. d. nitrogen and oxygen.

Give the number of significant figures: 0.011 cm Significant figures:

Calculate the kinetic energy of co2 at 254 k.

If i perform this reaction by combining 25.0 grams of lioh with an excess of fe (no3) 3, how much fe (oh) 3 will i be able to make

What is the maximum number of covalent bonds an element with atomic number 8 can make with hydrogen?

What are the chemical formulas for ... Heptasulfur Pentoxide: Trisulfur Monochloride: Selenium Hexafluoride: Tetranitrogen Pentasulfide: Carbon Nonachloride: ?

Write an equation for the reaction of hydrogen chloride and sodium sulfide to produce hydrogen sulfide with sodium chloride. 1. Show the formulas of the reactants 2. Show the formulas of the products. 3. Write the balanced equation for this reaction

Martha has a large amount of 1.25 M H2SO4 in her lab. She needs 36 grams of H2SO4 for a chemical reaction she wants to perform. How many liters of solution should she use?

A student makes observations when water is added to a blue solution of copper sulfate. The student makes only 1 observation: the solution changes to a lighter shade of blue. Is this an example of a chemical reaction? Explain your reasoning.