The number of electrons in the valence shell determine the types of bonds and atom, conform true or false
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Valence electrons are the electrons located in the outermost shell of an atom. They play a crucial role in determining how an atom interacts with other atoms. Show more…
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Katherine K.
Answer true or false. (a) A covalent bond is formed between two atoms whose difference in electronegativity is less than 1.9 (b) If the difference in electronegativity between two atoms is zero (they have identical electronegativities $),$ then the two atoms will not form a covalent bond. (c) A covalent bond formed by sharing two electrons is called a double bond. (d) In the hydrogen molecule $\left(\mathrm{H}_{2}\right),$ the shared pair of electrons completes the valence shell of each hydrogen. (e) In the molecule $\mathrm{CH}_{4}$, each hydrogen has an electron configuration like that of helium and carbon has an electron configuration like that of neon. (f) In a polar covalent bond, the more electronegative atom has a partial negative charge $(\delta-)$ and the less electronegative atom has a partial positive charge $(\delta+)$ (g) These bonds are arranged in order of increasing polarity $\mathrm{C}-\mathrm{H}<\mathrm{N}-\mathrm{H}<\mathrm{O}-\mathrm{H}$ (h) These bonds are arranged in order of increasing polarity $\mathrm{H}-\mathrm{F}<\mathrm{H}-\mathrm{Cl}<\mathrm{H}-\mathrm{Br}$ (i) A polar bond has a dipole with the negative end located at the more electronegative atom. (j) In a single bond, two atoms share one pair of electrons; in a double bond, they share two pairs of electrons; and in a triple bond, they share three pairs of electrons. (k) The Lewis structure for ethane, $\mathrm{C}_{2} \mathrm{H}_{6},$ must show eight valence electrons. (l) The Lewis structure for formaldehyde, $\mathrm{CH}_{2} \mathrm{O}$ must show 12 valence electrons. (m) The Lewis structure for the ammonium ion, $\mathrm{NH}_{4}^{+}$ must show nine valence electrons. (n) Atoms of third-period elements can hold more than eight electrons in their valence shells.
The higher the number of electrons in an atom, the higher the effective nuclear charge will be. Select one: True False
James K.
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