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HCN is linear. Both atoms are 180 degrees from one another.
We know carbon has 4 valance electrons. And needs 4 bonds to complete the shell.
Nitrogen has 5 and needs 3 to complete the shell.
Hydrogen has 1 and needs 1 to complete the shell.
So we want an arrangement where all shells are filled...ideally.
We can do this with a single bond from H to C and a triple bond from N to C.
C has no lone pairs...nothing else blocking the way. So we want the other two atoms on the carbon to be as far away from each other as possible...so it's a 180 angle.
This kind of thing is only confusing because of examples like H2O that are bent...but remember the oxygen in H2O has a lone pairs that need to be repelled by other electrons...meaning lone pairs repel each other as well as other atoms and vice versa so you end up with much more difficult angles.
But in this case, it's nice and simple. Linear molecule.
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A hydrogen bond.
Why does the presence of lone pairs contribute to the polarity of a water molecule?
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When the central atom of a molecule has unshared electrons the bond angles will?
When the central atom of a molecule has unshared electron, the bond angles will be less than when all the central atom's electrons are shared.
What bond connects the hydrogen atom to the central oxygen atom of a water molecule?
A hydrogen bond.
What shape is a molecule with four atoms covalently bonded to a central atom with bond angles of 109.5 degrees?
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Why does the presence of lone pairs contribute to the polarity of a water molecule?
How do lone pairs around the central atom affect the polarity of the molecule?
Is ammonia molecule a tetrahedral?
The bond angles between two N-H bonds in ammonia are close to the bond angles characteristic of a tetrahedron, but the molecule as a whole is not a tetrahedron because one of the four bonds to a central atom found in an actual tetrahedral molecule is missing; there are only three hydrogen atoms bound to a central nitrogen atom in ammonia. In an ammonium ion, however, the tetrahedron is complete.
What is the molecular structure of sulfate ion?
Thr polyatomic anion sulfate has a central S atom surrounded by O atoms at the corners of a terrahedron. The bond lengths are all the same, the bond angles are 109.5 o
What is the bond angle formed by an axial atom the central atom and any equatorial atom?
90 degrees
What shape is represent by three bond groups and one lone pair around a central atom?
Correct Answer : Trigonal Pyramid
What is the hybridization of the central atom in GeH4?
sp3 bond angle is 109.5
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The central atom in the hypothetical iodite ion would be surrounded by 10 electrons
Is electron a type of chemical bond?
No. An electron is a fundamental particle with a charge of -1. Electrons are in "clouds" around the central positively charged nucleus of an atom.
What is the chemical formula of axe perfume?
The AXE chemical formula is used to format the shape of molecules according to the VSEPR theory. A is the central atom, X is a bond between the central atom and another atom, and E is a lone electron pair. The AXE chemical formula is used to format the shape of molecules according to the VSEPR theory. A is the central atom, X is a bond between the central atom and another atom, and E is a lone electron pair. The AXE chemical formula is used to format the shape of molecules according to the VSEPR theory. A is the central atom, X is a bond between the central atom and another atom, and E is a lone electron pair.
