The VSEPR Model 10.33 Predict the shape or geometry of the following mole- cules‚ using the VSEPR model. a. SiF4 b. SF2 c. COF2 d. PCl3 10.34 Use the electron-pair repulsion model to predict the geometry of the following molecules: a. GeCl2 b. NF3 c. SCl2 d. XeO4 10.35 Predict the geometry of the following ions‚ using the electron-pair repulsion model. a. ClO3? b. PO43? c. SCN? d. H3O? 10.36 Use the VSEPR model to predict the geometry of the fol- lowing ions: a. N3? b. BH4? c. SO32? d. NO2
Premium Molecule Molecular geometry Atom
atom -Proton‚ neutron‚ electron 1b. An atom of calcium contains 20 protons. How many electrons does it have? -20 2b. Compare the structure of carbon-12 and carbon-13 -Carbon-12 has 6 protons‚ 6 electrons and 6 neutrons. Carbon-14 has 6 protons‚ 6 electrons and 8 neutrons. 4a. What are two types of bonds that hold the atoms within a compound together? -Ionic and covalent bonds 4b. A potassium atom easily loses its one electron. What type of bond will it form
Free Atom Chemical bond Hydrogen
Hall effect was discovered in 1879 by Edwin Herbert Hall while working on his doctoral degree at the Johns Hopkins University. The Hall effect is due to the nature of current in a conductor. Current consists of the movement of many small carriers(electrons‚ holes or both). Moving charges experience the Lorentz force when a magnetic field is present that is perpendicular to their motion. In the absence of the magnetic field‚ the charges follow ‘line of sight’ paths between collisions with impurities
Premium Magnetic field Electric current Electric charge
in which one or more pairs of electrons are shared by two atoms. Covalent bonds‚ in which the sharing of the electron pair is unequal‚ with the electrons spending more time around the more non-metallic atom‚ are called polar covalent bonds. In such a bond there is a charge separation with one atom being slightly more positive and the other more negative‚ i.e.‚ the bond will produce a dipole moment. On the other hand‚ Ionic bonds are bonds in which one or more electrons from one atom are removed and
Free Ionic bond Chemical bond Covalent bond
Metallic Bonding Metallic Bonding Why do metals conduct electricity? Metals conduct electricity. The delocalised electrons are free to move throughout the structure in 3-dimensions. They can cross grain boundaries. Even though the pattern may be disrupted at the boundary‚ as long as atoms are touching each other‚ the metallic bond is still present. Liquid metals also conduct electricity‚ showing that although the metal atoms may be free to move‚ the delocalisation remains in force until the
Premium Electron Metal Carbon
Atoms Atom is the fundamental building block of all stuff‚ or what scientists like to call "matter". An individual atom is very small. In fact‚ the smallest type of atom‚ hydrogen‚ has a diameter of 10-8 cm. Every single object is composed of atoms. Our body is made up of many‚ many individual atoms. There are also many different types of atom. These different types are called elements. Examples of some elements are hydrogen‚ oxygen‚ and helium. Under normal conditions many atoms can stick together
Premium Atom Electric charge Electron
determine the number of electrons available for bonding. I explain to my students that columns 4A-7A are ’wanna be’ noble gases‚ ie want 8 valence e- (except for first period since only need 2 e-). The elements are listed in columns and each of the A columns gives the number of valence electrons. Transition metals of course don’t follow the same rules‚ so just talk about columns 1A-8A. The atoms in columns 1A-4A can only make as many bonds as they have valence electrons‚ obviously. I use molecule
Free Atom Chemical element Periodic table
The picture above shows a typical gel electrophoresis set up. The clear container in the center of the picture is called a gel electrophoresis chamber. It contains the agarose gel that will be loaded with genetic material‚ as well as a buffer solution. It is connected to a DC power supply via electrodes. This picture was taken at Paw Print Genetics laboratory in Spokane‚ Washington. Viney and Fenton (1998) defined the term electrophoresis as‚ “the migration of charged particles through a static medium
Premium Electric charge Electromagnetism Electron
de-broglie wavelength ? a )α-parhcle b ) proton c ) β-particle d ) neutron 4. Dual character of an electron was explained by………. a ) Bohr b ) Heisenbery c ) de-brogle d ) pauli 5. The hybridization in SF6 molecule is………….. a ) SP3 b ) SP3d c ) SP3d2 d ) SP3 d3 6. The enery by an electron in an atom is given by En =………….. a ) -4π2me4n2h2 b ) -2π2me2n2h2 c ) -2π2me4n2h2
Premium Atom Hydrogen Oxygen
electrostatic force between two charges of 200 µC and 500 µC placed in free space is 5 gf. Find the distance between the two charges. (g = 10 m/s2) 12. Derive an expression for the electric current in terms of drift velocity. How the drift velocity of the electron depends on the temperature of
Premium Magnetic field Electron Electric charge