What is the formula to find the area of a triangle?
A = (1/2)b*h A - Area b - base h - height
What is the trend for atomic radii on the periodic table? How can this trend be explained?
Moving left to right the atomic radii decreases and increases moving up the columns. (Li has the largest radii). This is due to the forces between the negative electrons in the shells and the positive protons in the nucleus. The more protons and electrons there are, the stronger the pull between the two so the electrons are pulled closer to the center of the cell - making the radii much smaller.
What is the scientific name for a self destructive cell and why would this occur?
Apoptosis is the process for a cell to self rupture. A cell is programmed for apoptosis at the end of its cell life cycle. If this natural pre-programed nature did not occur then cells would proliferate and multiply forever - this is actually one known cause for cancer when cells do not commit "suicide."