SO3
Examples are BF3, SO3 and COCL2.
PCL5: Trigonal bipyramidal shape PH3: Trigonal pyramidal shape OF2: Bent shape ClO4-: Tetrahedral shape
The crystal structure of dolomite is trigonal, meaning that it has threefold symmetry. It consists of layers of carbonate ions alternating with layers of magnesium and calcium ions. This results in a rhombohedral crystal shape.
VSEPR theory predicts that the electron pairs in bonds and lone pairs repel one another and this gives rise to the shape. Lone pairs repel bonding pairs more than bonding pairs repel one another. It is often taught that electrostatic repulsion is the major cause of this but the man who invented the theory, Prof. Gillespie, says that the repulsion is due to the Pauli Exclusion Principle. See wikipedia link for a reasonable description.
A crystal is a mineral where all of the atoms are in a row, this is what makes it kind of clear. What determines its shape is the amount of space it has to form in and will usually have triangular pyramidal edges.
Examples are BF3, SO3 and COCL2.
PCL5: Trigonal bipyramidal shape PH3: Trigonal pyramidal shape OF2: Bent shape ClO4-: Tetrahedral shape
The crystal structure of dolomite is trigonal, meaning that it has threefold symmetry. It consists of layers of carbonate ions alternating with layers of magnesium and calcium ions. This results in a rhombohedral crystal shape.
BeCl2
VSEPR theory predicts that the electron pairs in bonds and lone pairs repel one another and this gives rise to the shape. Lone pairs repel bonding pairs more than bonding pairs repel one another. It is often taught that electrostatic repulsion is the major cause of this but the man who invented the theory, Prof. Gillespie, says that the repulsion is due to the Pauli Exclusion Principle. See wikipedia link for a reasonable description.
It depends on the phase and the temperature Solid AlCl3 has each aluminium is 6 coordinate, surrounded by 6 chlorine atoms in an octahedral formation. The best description here is a ionic bonding. Interestingly just below melt temperature the conductivity rises indicating free ions. AlCl3 in the melt is found as dimer Al2Cl6 with four coordinate aluminium. Two chlorines bridging the aluminium atoms. In this aluminium achieves its octet and the bond angles are in line with VSEPR theory. At high temperature the dimers dissociate to monomeric AlCl3 which is trigonal planar, following VSEPR theory.
Molecules are electrically neutral. Ions have electric charges.
Ions and molecules are the results of two different types of bonds. Ions are the result of ionic bonds and molecules are the result of covalent bonds.
Hydrogen ions can form water molecules (H2O) by combining with hydroxide ions (OH-) or hydronium ions (H3O+).
Water: H2O molecules, H+ and OH- ions
A crystal is a mineral where all of the atoms are in a row, this is what makes it kind of clear. What determines its shape is the amount of space it has to form in and will usually have triangular pyramidal edges.
The three parts of a bond is atoms, molecules, and ions. The three parts of a bond is atoms, molecules, and ions. The three parts of a bond is atoms, molecules, and ions.