5 dots around AS.
Arsenic has a metallic grey aspect.
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Pure arsenic is usually "grey arsenic". It looks like, well, a metal. Other allotropes do exist, but quickly transform into grey arsenic under normal conditions.
There's two ways to answer this question. First electron configurations with half-filled sublevels are more stable then electron configurations that don't have half-filled sublevels. Since Selenium is one elctron away from achieving a more stable half-filled sublevel configuration it more readily gives up it's outermost electron, so less energy is requires to remove the outermost electron. Arsenic already has the stable configuration of half-filled sublevel so it wouldn't give up it's electron as readily, so more energy is required to remove it. Another way to look at it is that Selenium's outermost electron is in a p orbital that already has an electron so there is electron electron repulsion present in that orbital so it's attraction to the nucleus is less which is why less energy is required to remove it so the ionization energy is less. Arsenic has it's outermost electron unpaired in the p orbital so there is no electron electron repulsion present in that orbital so more energy is required to remove it then for Selenium's outer most electron. Hope this helps!
There's no such Myachi as the "Electron M".
The electron configuration of polonium is [Xe]4f14.5d10.6s2.6p4.
a rod like structure
No device can give the complete structure of an atom but you can get a minute idea about the look of an atom using an Electron Microscope!
One must look into the acidity of arsenic acid, not just arsenic. Though the exact value of acidity is dependent on the ionization of the arsenic.
nothing
An electron dot usually looks like a dot. Sometimes people will draw them with alternative shapes to attempt to illustrate which atom contributed them, but usually they're just dots.
A germanium atom consists of a nucleus composed of protons and neutrons, surrounded by electron orbitals. The electron structure of a germanium atom is arranged in energy levels, with 32 electrons distributed among these levels. The outermost shell of a germanium atom contains 4 valence electrons.