) For comparison, the Sun has an abundance of elements heavier than helium of about ZSol 0.0172 0.002.

Heavier citizens make heavier demands on natural resources, especially water and energy.

Lighter isotopes of nitrogen are preferred in the reaction, leaving the heavier nitrogen isotopes in the residual matter.

The heaviest responsibility is shouldered by the powers that hold the largest arsenals.

This time will depend on the mass to charge ratio of the particle (heavier particles reach lower speeds).

He has been a forthright spokesman for women s rights and a champion of environmental concerns, as well as a formidable advocate in arguing for debt reduction for the most heavily indebted nations.

The first stars to form after the Big Bang may have been larger, up to 300 or more, due to the complete absence of elements heavier than lithium in their composition.

His system held that earth was the heaviest element, with the strongest movement towards the center, thus water formed a layer surrounding the sphere of earth.

Chemical composition When stars form in the present Milky Way galaxy they are composed of about 71 hydrogen and 27 helium, as measured by mass, with a small fraction of heavier elements.

Lighter molecules move faster than heavier ones with the same thermal kinetic energy, and so gases of low molecular weight are lost more rapidly than those of high molecular weight.