2 or more metals Atoms of metals are tightly packed together in a giant lattice similar to the lattice in ionic compounds. The outer electrons separate from their atoms and become delocalized, creating a ‘sea of electrons’. The atoms become positive and are attracted to these negative electrons. Properties of Metals High melting and boiling points (bonds are super strong) Excellent conductors of electricity (solid and liquid) more electrons, more conductivity Excellent Conductors of heat (solid and liquid) increased vibrations spread through sea of electrons Good Malleability and ductility in a metal can roll over each other while still maintaining their bonds, especially if heated. Why are metals described as having a of Which one of the following properties “sea electrons”? is not characteristic of typical metals? Electrons are wet Moderately high melting point Electrons move in waves High boiling Electrons move freely between atoms Brittle Electrons are fixed to metal atoms Good electrical conductor when a solid When 2 or more metals are combined they form an… Of the three major types of bonding Brass (ionic, covalent, metallic) which ones Alloy are based on electrostatic attractions Bronze between opposite charges? Covalent bond Only ionic bonding Only and covalent bonding Which of the following is a correct description Only and metallic bonding of a metallic property? covalent and metallic Metals are brittle bonding Metals are malleable Metals have a dull appearance Metals gain electrons to form anions True or false: metals give up electrons easily True False
2 or more metals Atoms of metals are tightly packed together in a giant lattice similar to the lattice in ionic compounds. The outer electrons separate from their atoms and become delocalized, creating a ‘sea of electrons’. The atoms become positive and are attracted to these negative electrons. Properties of Metals High melting and boiling points (bonds are super strong) Excellent conductors of electricity (solid and liquid) more electrons, more conductivity Excellent Conductors of heat (solid and liquid) increased vibrations spread through sea of electrons Good Malleability and ductility in a metal can roll over each other while still maintaining their bonds, especially if heated. Which one of the following properties is not characteristic of typical metals? Moderately high melting point High boiling Brittle Good electrical conductor when a solid Of the three major types of bonding (ionic, covalent, metallic) which ones are based on electrostatic attractions between opposite charges? Only ionic bonding Only and covalent bonding Only and metallic bonding covalent and metallic bonding True or false: metals give up electrons easily True False Why are metals described as having a “sea of electrons”? Electrons are wet Electrons move in waves Electrons move freely between atoms Electrons are fixed to metal atoms When 2 or more metals are combined they form an… Brass Alloy Bronze Covalent bond Which of the following is a correct description of a metallic property? Metals are brittle Metals are malleable Metals have a dull appearance Metals gain electrons to form anions
chem-unit-7-review.docx