Elements such as boron, silicon, and arsenic, are examples of:

What value should be reported for the total mass of three samples of iron weighing 117.0 g, 19.43 g, and 6.1043 g?

Isotopes have __________

As the wavelength of electromagnetic radiation decreases, which statement below is TRUE?

How can applicators recertify?

A block of concrete is a(n):

Indicate if each of the following is an example of potential energy or kinetic energy. A) Oxygen molecules moving at 650 m/s at room temperature is energy. B) A skier at the top of a ski hill is energy. C) Vibrating gold atoms in a piece of jewelry is energy.

Oxygen-18 has _____ protons, _____, neutrons, and _____ electrons.

Generally, when will new assignments become available?

Which subatomic particles have opposite charges?