Briefly explain the early theories of atomic structure. Why does ionization energy increase when moving across a period? Why is oxygen on the periodic table O? Why isn't it O2? Explain the periodic and group trends seen in the lifetimes (inert/labile) for exchange of water molecules ...
You can make glass by heating ordinary sand (which is mostly made of silicon dioxide) until it melts and turns into a liquid. You won't find that happening on your local beach: sand melts at the incredibly high temperature of 1700°C (3090°F). ...
The shell that lies outermost in an element is the valence shell. The electrons present in the valence shells are valence electrons. The number of valence electrons determines whether the element is a metal or not. Some examples are: Sodium The atomic number is 11. ...
One of the key problems in the theory of the origin of cosmic rays (high-energy protons and atomic nuclei) is their acceleration mechanism. The issue was addressed by Vitaly Ginzburg and Sergei Syrovatsky in the 1960s when they suggested that CRs are generated during supernova (SN) explosion...
as a crystal lattice (another name for a solid's internal, crystalline structure): lots of atoms arranged in a regular, endlessly repeating, three-dimensional structure a bit like an atomic climbing frame, only instead of bars there are invisible bonds between the atoms that hold them together...
move in the material. Their mobility, in turn, depends on the material’s atomic structure. In silicon solar cells, for example, silicon atoms line up in a very orderly fashion inside crystals, and even the smallest structural defects reduce the material’s ability to efficiently...
A solar cell's efficiency depends on how freely electrons and holes can move in the material. Their mobility, in turn, depends on the material's atomic structure. Insilicon solar cells, for example, silicon atoms line up in a very orderly fashion inside crystals, and even the smallest stru...
The atomic mass of the element is determined by the combined masses of neutrons and protons. True or false? Explain. Answer and Explanation: The atomic mass or atomic weight of an element (or put it in simple term, mass of an atom) is found ...
Answer and Explanation:1 Become a Study.com member to unlock this answer!Create your account View this answer We will focus on the molecular orbital theory that will explain chemical bonding. In molecular orbital theory, chemical bonding occurs because of the... ...
The solid state crystals would have a definite arrangement of constituent element with defined structure and geometrical shape. Answer and Explanation: Become a Study.com member to unlock this answer! Create your account View this answer The s...