An isotope of radon has 86 protons and 137 neutrons. What is the mass number of this isotope?

Who is issac newton?

A solutions is A. a pure substance that has a fixed volume and shape. B. a pure substance that does not have a fixed volume or shape. C. an unevenly distributed mixture of two or more components. D.

Which substance can be decomposed by chemical means

Which of the following is the best definition of a mineral? a naturally occurring liquid that can be used to make oil a crystalline solid that occurs naturally on Earth a substance made from raw materials a material that people make for some purpose

In model 1 the original amino acids are combined through a condensation reaction to make the dipeptide. a. what does r1 represent in the dipeptide?

Describe the steps you would use to solve this problem. In a scale drawing of a dining room floor plan, 10mm equals 2 meters. If the homeowners wanted to purchase flooring that costs $10.

In which of these samples do the molecules most likely have the least kinetic energy?

Just as heat can denature enzymes, so can a change in the pH. Enzymes that normally work in an acidic environment in the body can become denatured if the pH becomes too alkaline.

A group of students wants to see how temperature affects the time it takes for spilled water to dry up in the investigation what will be the dependent and independent variables

What is not true of white light?