The precise weight of a mole of some pure elements like silicon (Si) can vary slightly from the standard atomic mass, or even from sample to sample. Why?
A) The element may undergo radioactive decay.
B) The element may react with itself and gain or lose subatomic particles.
C) The atoms of the element form chemical bonds with each other, and that changes the weight of the element.
D) The element may have multiple stable isotopes, and the isotopic composition may vary from sample to sample.
E) The amount of energy absorbed by the element affects the mass of its electrons, and thus the atomic mass can vary slightly.
A portion of the periodic table of elements
Both men and women gain weight in young adulthood and middle adulthood, losing in the late 50s, but
The formed elements: In this image, the red cells are red, the white cells are white, and the ...
Summary of the Elements of a Swedish Massage Session
The fire triangle and the fire tetrahedron For combustion to occur, three elements must be ...
A solution is made by adding 0.100 mole of ethyl ether to 0.401 mole of ethyl alcohol. If the ...