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How does electronegativity affect water molecules?
When atoms of different electronegativity form a covalent bond, it forms a polar covalent bond in which the shared electrons are pulled closer to the more electronegative atom. In water, the oxygen atom is more electronegative than the hydrogen, so the electrons are pulled closer to the oxygen.
What makes water sticky?
Cohesion: Hydrogen Bonds Make Water Sticky The property of cohesion describes the ability of water molecules to be attracted to other water molecules, which allows water to be a “sticky” liquid.
What causes molecules to be sticky?
Adhesives are made to hold things together, and that stickiness comes from chemical bonds and the amount of force required to pull those bonds apart. When the positive dipole of one molecule is attracted to the negative dipole of another molecule, the force holding those molecules together is a van der Waals force.
Which is heavier an oxygen molecule or a nitrogen molecule?
The oxygen nucleus attracts its electrons more strongly—literally, keeps them closer—than the nitrogen nucleus does. Even though the oxygen molecule is heavier, it has a smaller volume compared to the nitrogen molecule. The diameter of an O 2 molecule is 292 picometers, and that of N 2 is 300 picometers.
This is an experimental measurement that pertains to the probability of one molecule to collide with another molecule. In brief, an atom’s “electron cloud” has a sphere of influence that extends beyond the atom itself, analogous to light emanating from a light bulb.
Which is a smaller molecule O 2 or n 2?
Nevertheless, an O 2 molecule has a smaller diameter and thus, a lower volume than an N 2 molecule. To understand why O 2 has a smaller molecular diameter than N 2, it’s helpful to visualize an “atom,” the base unit of all molecules.
What makes up most of the volume of an atom?
An atom consists of a nucleus (which holds a positive charge) surrounded by a cloud of electrons (which hold negative charges). Most of the atom’s volume consists of the electron cloud. Imagine a pea (the nucleus) in the middle of a baseball field (the entire atom).