Chemistry, 27.08.2019 23:40 sparky1234

Two atoms with an electronegativity difference of 0.4 form a bond that is
1. ionic, because electrons are shared
2. ionic, because electrons are transferred
3. covalent, because electrons are shared
4. covalent, because electrons are transferred

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Answer from: genyjoannerubiera

The correct answer is 3.

Explanation:

Ionic bond is defined as the bond formed when there is complete transfer of electrons from one atom to another atom. Example: NaCl

Covalent bond is defined as the bond formed when there is sharing of electrons between two atoms. The atom which takes the shared pair of electron towards itself is known as electronegative atom. Example: HCl

Dependency of electronegativity difference on ionic and covalent polar bond:

If the electronegativity difference is greater than 0 and less than 2.0, then the bond is covalent polar in nature and it shares the electrons.

And if the electronegativity difference is 2.0 or greater, then the bond is ionic polar in nature and the electrons are transferred from one atom to another.

As, the electronegativity difference given is 0.4, so the bond will be covalent and sharing of electrons will be there.

Answer from: Quest

Answer : option a) 84explanation :

considering the question as per the attachment

$^{222}_{86}> ^{218}_{84}po+^{4}_{2}he$

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.

Answer from: Quest

answer: semi-infinite solid initially at a uniform temperature of 400 ◦c is cooled at its surface by convection. the cooling fluid at a constant temperature of 200 ◦c has a convective coefficient (ha) of 250 w/m2.k. the physical properties of the solid: k = 20 w/m.k and α = 4 * 10-5 m2/s. using δx = 0.04 m and δt = 10 s. write the finite difference equations describing the transient heat transfer of the first five δx and the temperature profile after 30 s.

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Two atoms with an electronegativity difference of 0.4 form a bond that is
1. ionic, because e...

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