A bolder at the top of a hill breaks free and rolls down the hill. Which statement best represents the change in energy that occurs in this process?

Tungsten is a metal containing 74 protons, and is used widely in the electronics industry. What is the chemical symbol for tungsten?

What ion carries two negative charges and is isoelectronic with K +?

What kind of energy is stored as the result of position or composition?

The terms mass and weight are identical.

What is the number 0.9050 written in scientific notation using the proper number of significant figures?

Arsenic (As) is a metalloid.

Each piece of data is the individual result of a single measurement.

Concentration is a measure of the number or mass of particles of a substance that are contained in a specified volume.

There are nine periods on the periodic table.