For elements 93-118, which are lab-created trans-uranium elements (elements beyond uranium, which has an atomic number of 92), there is no "natural" abundance, according to the Los Alamos National ...

Can you name everything from Ac to Zr? Test your knowledge of the periodic table and see if you can top the leaderboard ...

The number of protons in an atom of any given element is always the same. Physicists call this the atomic number.So, in the above example of lead, its atomic number is 82 and that does not change ...

Atomic Number and Atomic Mass: Get here the easy notes on atomic number and atomic mass for all the first 30 elements. Know how to calculate atomic mass using atomic number.

Well, each element has its distinct properties owing to its atomic number, atomic mass, electronegativity and electron gain enthalpy. Importance Of Atomic Number In A Periodic Table ...

The classic Periodic Table organizes the chemical elements according to the number of protons that each has in its atomic nucleus. (Image credit: Karl Tate, Livescience.com contributor) Jump to: ...

Atoms of the same element with different numbers of neutrons are called isotopes of that element. The atomic mass in the periodic table is an average of the atomic mass of the isotopes of an element.

These super-heavy elements, which include all the elements beyond atomic number 104, are not found naturally on Earth, and thus have to be created synthetically within a laboratory.

The atomic weight of bromine, for instance, is commonly thought to be 79.904, but it can actually range between 79.901 and 79.907, depending on where the element is found.