What is the third ionization energy of a ground state Beryllium Be atom? Beryllium atoms have 4 electrons and the shell structure is 2.2. The ground state electron configuration of ground state gaseous neutral beryllium is [He]….Ionisation Energies and electron affinity. Ionisation energy number Enthalpy / kJ mol‑1 3rd 14848.72 4th 21006.64 How do you […]
How do we know the nucleus is positive?
How do we know the nucleus is positive? Rutherford deduced that the atomic nucleus was positively charged because the alpha particles that he fired at the metal foils were positively charged, and like charges repel. In Rutherford’s experiments most of the alpha particles passed straight through the foil without being deflected. Is a nucleus positive? […]
What is the difference between force and energy?
What are the limitations of valence bond theory?
What are the limitations of valence bond theory? Limitations of Valence Bond Theory The theory assumes that electrons are localized in specific areas. It does not give a quantitative interpretation of the thermodynamic or kinetic stabilities of coordination compounds. No distinction between weak and strong ligands. Why MOT is preferred over VBT? molecular orbital theory […]
What does the atomic mass tell you?
What does the atomic mass tell you? The atomic mass tells us the weight of protons and neutrons. How do you know how many electrons there are surrounding the nucleus of a particular atom? Why isn’t the atomic mass always a whole number? Atomic mass is never an integer number for several reasons: The atomic […]
Why some elements are reactive?
Why some elements are reactive? The number of electrons in the outermost shell of an atom determines its reactivity. Halogens are highly reactive because they readily gain an electron to fill their outermost shell. Alkali metals are highly reactive because they readily lose the single electron in their outermost shell. Is S or O more […]
Which is better PNP or NPN transistor?
Which is better PNP or NPN transistor? A NPN transistor has electrons as majority charge carriers whereas the PNP transistor has holes as majority charge carrier. The mobility of electrons is better than mobility of holes. mobility of electrons is more than hole,so as a result npn transistor are faster than pnp that’s why they […]
Is it bad to be in peak heart rate zone?
Is fuel line measured ID or OD?
Is fuel line measured ID or OD? Tubing is OD (outside diameter) and Pipe is ID (inside diameter). So the easiest way to tell the size of your fuel line, which is tubing, is to use a combination wrench. Whichever one slips over snuggly is the winner. What size is fuel line? Recommended Size, Based […]
Which best describes the difference between radiation and conduction?
Which best describes the difference between radiation and conduction? Convection is the transfer of energy by movement of a medium, whereas radiation is the transfer of energy by, well, thermal radiation. Conduction also requires a medium, but, again, it is a fundamentally different mechanism than either convection or radiation; in this case it is the […]