What is approximate half-life of carbon-14?

A. 300 years

B. 2,400 years

C. 5,720 years

The feeling of which orbital is represented by the transition metals in period Four

Density multiplied by mass equal volume?

Myra puts kernels of wheat in a grinder and grinds them into flour. She then adds salt, baking soda, sugar, and dry yeast and mixes them together.

Explain how a Buffer acts to resist pH change in a system upon addition of an acid or a base

Which force keeps electrons in orbit around the nucleus? a. weak nuclear force b. strong nuclear force c. electromagnetic force d. gravitational force

How does the energy of the activated complex compare with the energies of reactants and products? select one: a. it is lower than the energy of both reactants and products. b.

A student asked to convert measurements from liters to mililiters and from mililiters to liters. His answers are shown in bold in the choices shown below. On which choice did he make a mistake?

Donald is making a model of a nitrogen atom. The box for nitrogen in the periodic table is shown. To represent a neutral atom, which of these must Donald include in his model?

What are the charges and relative masses of the 3 main subatomic particles

What three things happen in order for a chemical reaction to occur?