Atomic Number Vs. Atomic Density

Periodic table of elements
••• Hemera Technologies/ Images

Atomic density means the number of atoms per unit volume. The atomic number of an element represents the number of protons in the nucleus and the number of electrons surrounding it.

Periodic table of the elements

The periodic table of elements lists elements in ascending order according to its atomic number. Hydrogen, the first element in the periodic table, has the atomic number of one, corresponding with the number of protons in the nucleus. The last element in the periodic table is Ununoctium, and it has 118 protons in the nucleus.

Atomic weight

As the atomic number increase, the actual weight of each of the elements also tends to increase. When looking at the periodic table, the elements generally get heavier going down each column and to the right across each row.


The density of an atom is determined by the number of atoms a substance per unit volume of the material. Solids will have a higher atomic density than gases.

Atomic number

The atomic number refers to the number of protons in the nucleus of a substance. Since undisturbed elements have a neutral electrical charge, the number of electrons is also the same as the atomic number. Except for a few cases, the atomic weight increases as does the atomic number.

Synthetic elements

Elements with the atomic numbers 104-118 are synthetically-produced materials that have not been found in the natural world. They have only been produced in places such as laboratories or particle accelerators. Ununoctium was discovered as recently as 2002 in Dubna, Russia.

Related Articles

How to Solve Chemistry Isotope Problems
Temperature Effects on Density
Difference Between Density & Mass
How Many Protons Does Calcium Have?
Relationship Between the Atomic Number and the Chemical...
Volume Vs. Mass Density
Density Vs. Concentration
What Does It Tell You if Iron Has an Atomic Number...
What Is a Noble Gas Configuration?
Why Is the Periodic Table Arranged in Columns & Rows?
How to Calculate Subatomic Particles
How to Calculate Particle Concentration
How to Calculate the Volume of an Atom
How to Convert Micromolar to PPM
Which of the Metalloids Has the Smallest Atomic Radius?
How to Calculate the Mass of a Solid
What Does Electronegativity Have to Do With Oxidation...
Number of Protons in an Uncharged Atom
Does the Nucleus of an Atom Have Much of an Effect...
Third Grade Science for the Measurement of Density

Dont Go!

We Have More Great Sciencing Articles!