Covalent Solids & Molecular Crystals Lowersixth Science Chemistry

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Chemistry topic for 17-year-olds

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Covalent Solids & Molecular Crystals Lowersixth Science Chemistry


Froggy Jumps Covalent Solids & Molecular Crystals Lowersixth Science ChemistryVersion en ligne Chemistry topic for 17-year-olds par YAKILI LMS 1 What type of bonding forms covalent solids and molecular crystals? a Ionic bonds b Covalent bonds c Metallic bonds 2 Which is a covalent network solid example? a Ice b Diamond c Sodium chloride 3 Which is a molecular crystal example? a Ice b Quartz c Diamond 4 Do covalent network solids have high or low melting points? a Very low b Very high c Moderate 5 Do molecular crystals conduct electricity in solid form? a Yes b No c Only liquids 6 Which substance is a covalent network solid? a Water ice b Quartz c Sucrose 7 Which property is typical of molecular crystals? a Hardness b High density c Low melting point 8 What keeps atoms together in a covalent solid? a Metallic bonds b Covalent bonds c Ionic bonds 9 Which is NOT a property of covalent solids? a Excellent electrical conductivity b Rigid structure c High hardness 10 What is the bonding in ice (solid water)? a Metallic bonds b Covalent network with hydrogen bonds c Ionic bonds 11 Diamond is famous for which property? a Electrical conductivity b Malleability c Extreme hardness 12 Graphite conducts electricity due to... a Delocalized electrons b Hydrogen bonding c Ionic bonds 13 Which is a molecular crystal? a Quartz b Magnesium oxide c Dry ice (CO2 below sublimation) 14 Covalent solids typically have what kind of bonds? a Ionic bonds between ions b Covalent bonds between atoms c Metallic bonding among atoms 15 Which substance has a network of silicon-oxygen bonds? a Ice b Quartz c Sodium chloride 16 Are molecular crystals usually softer or harder than covalent solids? a Harder b Softer c Brittle but hard 17 What describes the structure of covalent solids? a Gas-phase molecules b Extremely large molecular lattice c Ions in a lattice 18 Which property best distinguishes covalent solids from molecular crystals? a Solubility in water b Crystal color c Shared electron network 19 Which bonding initiates network structures like in diamond? a Covalent covalent sharing b Ionic attraction c Metallic bonding 20 Are covalent solids usually brittle or malleable? a Ductile b Brittle c Malleable 21 Which is an example of a molecular crystal with weak forces? a Diamond b Iodine crystal c Quartz 22 What type of lattice do covalent solids form? a Gas lattice b Three-dimensional network c Packed molecular lattice 23 Which property is common to many covalent solids? a Excellent conductivity b Very high melting point c Solubility in water 24 Which substance is NOT a molecular crystal? a Dry ice b Iodine crystal c Diamond 25 What is the main difference between covalent solids and ionic solids? a Color b Solubility in oil c Bond type 26 Graphite's conductivity arises from? a Ionic charges b Delocalized electrons in layers c Hydrogen bonds 27 Which material is a covalent network solid? a Ice b Silicon carbide c Sodium chloride 28 Which statement about molecular crystals is true? a Low melting points b Strong ionic bonds c Very high hardness 29 Which factor most limits melting in covalent solids? a Color b Strength of covalent bonds c Molecular size 30 Which describes Diamond's structure? a Molecular packing b Tetrahedral carbon network c Layered planes 31 Would water ice be a covalent solid or molecular crystal? a Molecular crystal b Metallic solid c Covalent network solid 32 Which is not typical for covalent solids? a Rigid lattice b Very high melting points c Good electrical conductivity in solid state 33 Which force holds molecular crystals together? a Metallic bonds b Covalent bonds c Intermolecular forces 34 Which is a property of many molecular crystals? a Excellent conductivity b Very high hardness c Low density 35 Which chemical element forms the backbone of many covalent solids? a Carbon b Neon c Sodium 36 Which is an example of a covalent molecular crystal? a Graphite b Magnesium oxide c Naphthalene 37 Which is true about covalent solids' conductivity? a Always superconductors b Usually poor conductors c Excellent conductors 38 Which is a covalent network solid containing Si–O bonds? a Quartz b Ice c Graphite 39 What happens to the melting point of molecular crystals as intermolecular forces increase? a Stays the same b Melting point rises c Melting point falls 40 Which is true about dry ice (CO2) at room temperature? a Melts to liquid b Sublimes from solid to gas c Becomes plasma 41 Which property best separates covalent solids from metals? a Lack of metallic bonding b Luster c Malleability 42 What is the main type of attraction in molecular crystals like ice? a Metallic bonding b Hydrogen bonding c Ionic bonding 43 Which covalent solid forms a tetrahedral lattice? a Graphite b Ice c Diamond 44 Are covalent solids typically brittle or flexible? a Flexible b Brittle c Ductile 45 Which characteristic is typical of molecular crystals but not covalent solids? a Insolubility b Lower hardness c Higher hardness 46 Which is an example of a molecular crystal? a Diamond b Quartz c Iodine crystal 47 What keeps ice from melting at very low temperatures? a Ionic bonds b Metallic bonds c Hydrogen bonds stabilize structure 48 Which statement is true about covalent bonds in solids? a They form a continuous network b They are always ionic c They are metallic bonds 49 Which property is often used to identify covalent solids? a Low density b Electrical conductivity in solid c Hardness and high melting point 50 What is the bonding in quartz? a Metallic b Covalent network c Ionic

Covalent Solids & Molecular Crystals Lowersixth Science Chemistry

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Covalent Solids & Molecular Crystals Lowersixth Science ChemistryVersion en ligne

par YAKILI LMS

What type of bonding forms covalent solids and molecular crystals?

Which is a covalent network solid example?

Which is a molecular crystal example?

Do covalent network solids have high or low melting points?

Do molecular crystals conduct electricity in solid form?

Which substance is a covalent network solid?

Which property is typical of molecular crystals?

What keeps atoms together in a covalent solid?

Which is NOT a property of covalent solids?

What is the bonding in ice (solid water)?

Diamond is famous for which property?

Graphite conducts electricity due to...

Which is a molecular crystal?

Covalent solids typically have what kind of bonds?

Which substance has a network of silicon-oxygen bonds?

Are molecular crystals usually softer or harder than covalent solids?

What describes the structure of covalent solids?

Which property best distinguishes covalent solids from molecular crystals?

Which bonding initiates network structures like in diamond?

Are covalent solids usually brittle or malleable?

Which is an example of a molecular crystal with weak forces?

What type of lattice do covalent solids form?

Which property is common to many covalent solids?

Which substance is NOT a molecular crystal?

What is the main difference between covalent solids and ionic solids?

Graphite's conductivity arises from?

Which material is a covalent network solid?

Which statement about molecular crystals is true?

Which factor most limits melting in covalent solids?

Which describes Diamond's structure?

Would water ice be a covalent solid or molecular crystal?

Which is not typical for covalent solids?

Which force holds molecular crystals together?

Which is a property of many molecular crystals?

Which chemical element forms the backbone of many covalent solids?

Which is an example of a covalent molecular crystal?

Which is true about covalent solids' conductivity?

Which is a covalent network solid containing Si–O bonds?

What happens to the melting point of molecular crystals as intermolecular forces increase?

Which is true about dry ice (CO2) at room temperature?

Which property best separates covalent solids from metals?

What is the main type of attraction in molecular crystals like ice?

Which covalent solid forms a tetrahedral lattice?

Are covalent solids typically brittle or flexible?

Which characteristic is typical of molecular crystals but not covalent solids?

Which is an example of a molecular crystal?

What keeps ice from melting at very low temperatures?

Which statement is true about covalent bonds in solids?

Which property is often used to identify covalent solids?

What is the bonding in quartz?