What BEST compares the properties of ionic and metallic substances? Group of answer choicesThe bonds of metallic substances are composed of delocalized electrons, and the bonds of ionic substances are composed of transferred electronsThe bonds of metallic substances are composed of ioslated electron, and the bonds of ionic submstances are composed of shared electrons.A metallic substance insulates heat and electricity, and solid ionic substances conduct heat and electricity.A metallic substance has a low melting point, and an ionic substance has a low melting point

Which of the following are properties of ionic compounds?Low melting and boiling points, do not dissolve in waterHigh melting and boiling points, dissolve in waterLow melting and boiling points, dissolve in waterHigh melting and boiling points, do not dissolve in water2Ionic compounds can:Conduct electricity when solid but not liquidThey cannot conduct electricity when liquid or solidConduct electricity when both solid and liquidConduct electricity when liquid but not solid3The atoms in simple molecular structures are held together by which type of bonds?CovalentIonicIonic and covalentMetallic4Simple molecular structures have:Weak molecular bonds and strong intermolecular bondsStrong molecular bonds and weak intermolecular bondsStrong molecular bonds and strong intermolecular bondsWeak molecular bonds and weak intermolecular bonds5Giant structures can be formed from millions of atoms held together by:Metallic bondsCovalent bondsIonic bondsIonic, covalent or metallic bonds6Graphite is the only giant covalent structure that:Dissolves in waterHas a high melting pointIs a form of carbonConducts electricity

Which of the following is not a property of ionic compounds?Good electrical conductivity in all states.Very high boiling points.Form crystalline structures.Usually a solid at room temperature.

Which of the following is not a general property of ionic compounds?Only one correct answerA.High melting and boiling pointB.Soluble in waterC.Good conductor of electricity in aqueous solution and in solid stateD.Hard and brittle

Which one of the following statements is false? Most ionic compounds are solids at room temperature and atmospheric pressure. Metal alloys tend to be hard and brittle. The bond between silicon and oxygen is primarily covalent. The bonding in LiH is primarily ionic. Molten sodium chloride is an excellent conductor of electricity.

Metallic bonding always occurs between:Noble gasesMetal atomsNon-metal atomsMetal and non-metal atoms2A metallic bond is the electrostatic attraction between:Positive ions and delocalised electronsNegative ions and delocalised electronsElectrons and delocalised negative ionsElectrons and delocalised positive ions3Which of these is a property of metals?Poor conductors of electricityLow boiling pointsMalleableLow melting points4Which of the following statements best describes why metals are good conductors of heat?Metallic bonds are very strongLayers of metal atoms can slide past one another easilyMetals have high melting pointsThe delocalised electrons can carry thermal energy through the substance5Which of the following is a metal alloy?AluminiumCopperSteelIron6Metal alloys are generally harder and stronger than the individual elements they are made from. This is because the atoms of each element are of a different size and therefore:Disrupt the regular layers of ions, making them less malleableIncrease the size of the latticeLead to an increase in boiling pointLead to an decrease in boiling point