- soluble gases mix homogeneously. Lesson 13.2 The intermolecular bond concept: vapor pressure, viscosity, and surface tension are determined by strength of molecular attraction. electrons in a nonpolar molecule are constantly shifting about. Dispersion force - temporary dipole attractions that can occur between nonpolar molecules. dispersion forces occur frequently for short periods of time.
Diffusion, Osmosis and Active transport. Diffusion: Seeing that substances have kinetic energy (energy of motion), they are continuously moving around, colliding with one another, and moving in various directions. The random mixing of ions and molecules due to their kinetic energy is called diffusion. If a particular ion or molecule is present in an area where there is a lot of that particular molecule, it would be in a high concentration area of itself. All the molecules would then collide with each other due to their kinetic energy, eventually forcing themselves away from each other, where there is more space.
While hydrogen bonds have a uniquely high surface tension, van der Waals forces have a relatively weak attraction, which causes low surface tension. According to an author of Chem Guide, Jim Clark, in van der Waals forces, “the electrons are mobile, and at any one instant they might find themselves towards one end of the molecule, making that end slightly positive” (2000). In other words, oil is NOT a polar molecule like water, which causes the molecules to not stick to each other as well. The reason tension would occur is because the
An optimised imaging modality would result from a combination of these properties. One such emerging technique that achieves this is Cherenkov Luminescence Imaging (CLI). CLI harnesses Cherenkov radiation to image radionuclides using OI instruments2. Cherenkov radiation is a well known phenomenon that arises when charged particles, such as β- or β+ travel through an optically transparent material with a velocity that exceeds the speed of light in the material. As the particle travels through the medium it loses kinetic energy by polarizing the electrons of the given material.
The slower molecules gain more thermal energy and collide with other molecules in the cooler object. This process continues until heat energy from the warmer object spreads throughout the cooler object. Some substances conduct heat more easily than others. Solids are better conductor than liquids and liquids are better conductor than gases. Metals are very good conductors of heat, while air is very poor conductor of heat.
The presence of the positive charge induces a mass migration of electrons from sphere B towards (and into) sphere A. This movement is induced by the simple principle that opposites attract. Negatively charged electrons throughout the two-sphere system are attracted to the positively charged balloon. This movement of electrons from sphere B to sphere A leaves sphere B with an overall positive charge and sphere A with an overall negative charge. The two-sphere system has been polarized.
Static electricity is produced from a process known as triboelectrification. To show how much static electricity an object has, it is determined by its position on the triboelectric series. Its position on this scale is determined by how tight the atom is holding the electrons. An atom is more positive in the triboelectric series if a material is more apt to give up electrons when in contact with another material. If a material is more apt to "capture" electrons when in contact with another material, it is more
When there’s no magnet around, ferrofluid acts like a liquid. The magnetite particles move freely in the fluid. But when there’s a magnet nearby, the particles are temporarily magnetized. They form structures within the fluid, causing the ferrofluid to act more like a solid. When the magnet is removed, the particles are demagnetized and ferrofluid acts like a liquid again.
* X belongs to Group 2 of the periodic table because it has a low first and second ionization energy, however, a higher second and third. * b. What charge would you expect element X to have when it forms an ion? * Element X would form a positive charge because the first two would be kicked out and that would leave the two valence electrons forming an ion with +2 charge. * c. If you were to place elements X and Y into the periodic table, would element Y be in the same period as element X?
11.2 Particulate Model for Solids, Liquids and Gases A block of ice Solid molecules have a restricted motion = Solid A beaker of boiling water Gas molecules are able to move at extremely high speed = Gas A beaker of warm water liquid molecules have greater mobility = Liquid States of Matter Solid * In solids, the molecules are arranged close together in a regular pattern * Strong attractive intermolecular forces hold the molecules in position so they have definite shape and volume * They can only vibrate in their fixed positions Liquid * In liquids, the molecules are not arranged in a regular pattern and are slightly further apart then those in solids * The attractive intermolecular forces are not very strong. Thus, the molecules are able to move among one another, giving liquids its definite volume but not a definite shape. Gases * In gases, the molecules are widely spaced. Intermolecular forces are negligible * The molecules move about randomly with high speeds, colliding with the walls of the container, occupying any available space. Research on *phase changes for water* Heating curve (Please!!!!!!