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Why do Copper and Chromium only have 1 electron in their S orbitals?

The reason Copper and Chromium have a slighly odd electron configuration is because of stability. By only having 1 electron in the 4s oribtal, Chromium is able to have 1 electron in each of it's 3d orbitals,...
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Can I take a derivative at x=0 for the function f(x) = |x| ?

Just because a function is continuous at a point, that doesn't mean it has a derivative at that point. If a function is differentiable on an interval, then it is continuous on that interval, but the reverse ...
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Answered by Tutor68168 D. • Maths tutor
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Why, in a thermal flask, does having a vacuum layer help keep the coffee warm?

Heat is transferred by 3 processes, conducation, convection and radiation. Having a vacuum layer stops heat being transferred away from the coffee by conduction. Conduction works by air molecules bumping int...
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Answered by Benjamin O. • Physics tutor
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Explain the role of the diaphragm when breathing in and out

The diaphragm is a large muscle located at the base of the lungs. It is naturally dome shaped when relaxed. When we need to inhale, the diaphragm will contract and flatten out. This increases the volume of t...
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Answered by Salko K. • Biology tutor
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Explain why an atom has no overall charge

Atoms are made up of three different types of particle. Protons and neutrons exist in the nucleus, while electrons orbit. The relative charges of these particles mean that protons are positive while electron...
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Answered by Salko K. • Chemistry tutor
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