Statistically speaking, the mean is the most stable from sample to sample. Whereas, the mode is the least stable statistically speaking from sample to sample.
The question is not clear. Hardest, as in the most rigid, is a triangular prism (or tetrahedron). Hardest, to work the geometry of, is probably an irregular blob.
The most simple pyramid is a tetrahedron. This pyramid has four faces, all triangles. If the pyramid was a cone then it could have two faces.
Possibly, the most common and stable isotope of Nitrogen.
a pyramid, in the sense that most people think of has a square base, with 4 triangle 'sides', which would be 5 faces. A regular tetrahedron has 4 equilateral triangles as faces.
A Tetrahedron. The most common form of a tetrahedron is called a regular tetrahedron, or a pyramid
There are 25 natures available, most raising one stat by 10% and decreasing another by 10%. However, there are five natures that are neutral, and don't improve or hinder any stats. Psypokes.com has a good table displaying all natures, their effects, and likes/dislikes. It can be found here: http://www.psypokes.com/lab/natures.php
The silicon-oxygen tetrahedron is the building block of most silicate minerals, consisting of a silicon atom surrounded by four oxygen atoms in a tetrahedral arrangement.
The one he is most famous for is dynamite, and others involve similar processes of securing nitroglycerine into inert structures to make it stable.
http://myamazingfact.blogspot.com/2009/02/18-of-natures-most-powerful-medicinal.html
Tritium is not the most stable isotope known.
Triangles are considered the most stable shape for structures because they distribute weight and forces evenly. The triangular shape is the strongest geometric shape because it has the smallest possibility of warping or collapsing under stress. That's why many buildings and bridges are designed with triangular supports.
A shape formed by four triangles would have to be a tetrahedron. But I believe that a tetrahedron can have at most three right angled triangles. One with four of them is, I think, impossible.
My money is on the tetrahedron, triangles tend to be very sturdy.
Well the human brain is the most developed than any other animal so we are the most complex beings
A tetrahedral arrangement of charge clouds is expected for an atom with four charge clouds. This arrangement is formed by placing the charge clouds at the corners of a tetrahedron, providing the most stable arrangement that maximizes the distance between them.
An insulator is most likely to have covalent bonds, which involve the sharing of electrons between atoms. Covalent bonds are strong and can lead to stable structures that do not conduct electricity well.