CMS Midterm Review

Front

What is density?

Back

Density is the mass of a substance divided by its volume, often expressed in grams per cubic centimeter (g/cm³).

Front

Which substance is the least dense?

Back

Water is less dense than sea water, rock, and iron.

Front

What charge does an electron have?

Back

An electron has a negative charge that is smaller than a proton.

Front

Where are electrons located in an atom?

Back

Electrons are located outside the nucleus of an atom.

Front

What types of particles are found outside the nucleus of an atom?

Back

Negative particles (electrons) are found outside the nucleus.

Front

How do you determine the number of neutrons in an atom?

Back

The number of neutrons can be determined by subtracting the atomic number from the atomic mass.

Front

What is the atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is the atomic mass?

Back

The atomic mass is the weighted average mass of an atom's isotopes, typically expressed in atomic mass units (amu).

Front

What is the nucleus of an atom?

Back

The nucleus is the central part of an atom, containing protons and neutrons.

Front

What is the charge of a proton?

Back

A proton has a positive charge.