PHY 2020 Lecture Notes - Lecture 11: Molecular Mass, Unified Atomic Mass Unit, Carbon-12
Document Summary
Electrons contribute to an atom"s size: a hydrogen atom and a carbon atom move at the same speed. Electrons in one atom repel the electrons in another. A mole will possess mass approximately equal to the substances molecular weight: a tree is composed mainly from carbon. All of these: the size of atoms has most to do with its: 3: an atomic mass unit (amu) is 1/12 the mass of: The number of protons: in our part of the universe, antimatter is: Short lived: solid matter is mostly empty space largely because: 18 amu: in an electrically neutral atom, the number of protons in the nucleus is balanced by an equal number of: Orbital electrons: atoms heavier than helium were made by: Thermonuclear fusion: if we doubled the magnifying power of the most powerful optical microscope on the world, we would. Still not be able to see or photograph an atom.
