Question

1. chemical name: hydrogen cyanide

formula: hcn
lewis electron - dot structure:
perspective drawing with bond angles:
standard electron geometry:
molecular geometry:
hybridization of central atom:
is the molecule polar, nonpolar, or ion?
do not assemble this model

Explanation:

Step1: Determine valence - electrons

H has 1 valence - electron, C has 4, and N has 5. Total valence - electrons = 1 + 4+5 = 10.

Step2: Draw Lewis structure

C is the central atom. H is bonded to C with a single bond (H - C), and C is triple - bonded to N (C≡N). C has a full octet and H has a full duet. The Lewis structure is H - C≡N, with two non - bonding electrons on N.

Step3: Electron geometry

There are 2 electron - groups (a single bond and a triple bond) around the central C atom. The standard electron geometry is linear.

Step4: Molecular geometry

Since there are no lone pairs on the central C atom, the molecular geometry is also linear.

Step5: Hybridization of central atom

The central C atom has 2 electron - groups, so it is sp hybridized.

Step6: Polarity

The electronegativity of N (3.04) is greater than that of C (2.55) and H (2.20). The molecule has a net dipole moment, so it is polar.

Answer:

Lewis electron - dot structure: H - C≡N (with two non - bonding electrons on N)
Perspective drawing with bond angles: Linear, 180°
Standard electron geometry: Linear
Molecular geometry: Linear
Hybridization of central atom: sp
Is the molecule polar, nonpolar, or ion? Polar