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Secondary electron images show morphology and topographyof a sample. The more the number of electrons reaching the detector, the brighter the image is. Back scattered electron images show difference in composition - or more exactly, difference in atomic number over a sample. The higher the atomic numbers of the atom, the more backscattered electrons are bounced back, making the image brighter for larger atoms.

A second difference is back scattered electrons are produced by the elastic interaction of the beam electron with nuclei of atoms in the specimen. No energy is lost as it is elastic interaction. On the other hand secondary electrons are produced by inelastic interaction of beam electrons with electrons in the atom rather than the nucleus. Since it is inelastic interaction, there is energy loss.

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What kind of bond results when electron transfer occurs between atoms of 2 different elements?

The kind of bond that results when electron transfer occurs between atoms of two different elements can be considered covalent, polar covalent, or ionic. The type of bond will depend upon the identities of the elements and their electronegativity's.


The force between the nucleus and the outermost electron for the large atom is?

The force between the nucleus and the outermost electron in a large atom is primarily governed by the attraction between the positively charged nucleus and the negatively charged electron. This force is known as the electrostatic force of attraction and is directly proportional to the product of the charges and inversely proportional to the square of the distance between the nucleus and the electron.


Is an example of an electrostatic force acting in an atom neutron attracting an electron a proton attracting an electron an electron attracting another electron a neutron attracting a proton?

Yes, an example of an electrostatic force acting in an atom is a proton attracting an electron. This attraction occurs due to the opposite charges of the proton (positive) and the electron (negative), leading to the electrostatic force of attraction between them.


Does N and Br have a covalent bond?

Yes, nitrogen (N) and bromine (Br) can form a covalent bond when they share electrons to achieve a stable electron configuration. Covalent bonds involve the sharing of electron pairs between atoms and can occur between different nonmetals like N and Br.


The fewer electron shells the shielding of electrons from the nucleus.?

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