When do electrons emit energy?

An archeological artifact has a carbon-14 decay rate of 2.75 dis/min·gC. If the rate of decay of a living organism is 15.3 dis/min·gC, how old is this artifact? Assume that t1/2 for carbon-14 is 5730 yr. 1.42 * 104 yr1.209 * 10-4 yr6.16 * 103 yr1.

Why don't solids change shape?

A hot metal plate at 150°C has been placed in air at room temperature. Which event would most likely take place over the next few minutes? O Molecules in both the metal and the surrounding air will start moving at lower speeds.

Is carbon dioxide a compound, element, or a mixture? wat about air wat is it

What is an indicator? name some examples of pH indicators and their specific uses. (at least 4)

Suppose a student did not fully redissolve the Al (OH) 3 that initially formed upon the addition of H2SO4. Predict and explain how this would impact the apparent percent yield this student determines.

Essential amino acids are those that our bodies cannot synthesize. question 7 options: true false

What is linen composed of

Which of the following elements has the lowest electronegativity? A) Xe B) Rb C) I D) Cl

An oxidation-reduction reaction is also known as a redox reaction. What is one way you could tell that a redox reaction has occurred? a. when one substance transfers electrons to another. b. when a substance reacts with oxygen. c.