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compound. Brittle The ability to be crushed into pieces when hammered, a property of nonmetals. Cation A positively charged ion. Compound A substance composed of two or more atoms from different elements CHEMICALLY bonded together. Covalent Bond Chemical bond involving the SHARING of electrons between two nonmetal atoms.

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c. They form hard, brittle crystals with characteristic shapes. d. They contain no charged particles. In what form can an ionic compound conduct electricity? a. as a solid b. when dissolved in water c. as a crystal d. when warmed slightly A chemical bond formed when two atoms share electrons is called a(n) a. ionic bond b. covalent bond
To decide if a binary compound has ionic or covalent bonding, first locate the two elements concerned in the Periodic Table and decide if they are metals (shown in blue) or non-metals (shown in pink). If they are both non-metals (such as carbon and oxygen) they will form a covalent compound (such as carbon dioxide, CO 2).

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Properties of Ionic Compounds. Ionic compounds tend to have high melting points (above 300oC). Ionic compounds are poor conductors in the solid state, but they can conduct heat or electricity when they are melted. Ionic compounds are brittle, so they shatter when struck by a hammer.
Each carbon atom can make 4 covalent bonds to 4 other carbon atoms. Each outer atom then bonds to 3 more and so on. Eventually millions of carbon atoms are bonded to form a giant lattice. Properties of diamond Very hard - hardest known substance. Each atom held to 4 others by strong covalent bonds - this explains the high melting point.

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They are hard but brittle solids and are poor conductors of electricity in the solid state (good conductors when molten or in solution). To explain these properties we must examine the nature of the bonding in these compound. Ionic bonds are "strong" and omnidirectional (i.e. the ions are attracted to ions of opposite charge in all directions).
As a metalloid, its chemistry is largely covalent in nature, noting it can form brittle alloys with metals, and has an extensive organometallic chemistry. Most alloys of arsenic with metals lack metallic or semimetallic conductivity.

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A single covalent bond is a shared pair of electrons. Most covalent bonds are single bonds, consisting of one of the pair of electrons being from each atom. Atoms can also bond together by sharing two pairs of electrons in a double covalent bond, such as in an O 2 molecule. Atoms can also form triple covalent bonds, such as in an N 2 molecule.
The atoms in these solids are held together by a network of covalent bonds, as shown in Figure 10.41. To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically characterized by hardness, strength, and high melting points.

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Covalent Bonds. Can exist as solids, liquids, or gases at room temperature. Covalent molecules have a wide range of melting points. Most covalent molecules have a low boiling point. Some covalent molecules form brittle solids. Typically they are not malleable or ductile
most are ductile and malleable; some are brittle (Cr, Mn, Ga, Ru, W, Os, Bi) brittle ... seldom form covalent compounds; form salts as well as covalent compounds

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Ions, Polar Molecules, and Physical Properties Section 9.2 Ionic compounds tend to be brittle, solid substances with high melting points. Covalent substances may be solids, liquids, or gases at room temperature.
The atoms in these solids are held together by a network of covalent bonds, as shown in . To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically characterized by hardness, strength, and high melting points.

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Covalent Bonds • Two electrons shared together have the strength to hold two atoms together in a bond. • Covalent bonds may form between atoms of the same element or different elements – H 2 – O 2 – CO 2 – C 6H 12O 6
Malleable substances can be bent or hammered into shape without shattering, while brittle. substances shatter ... point of metals are more similar to those for ionic compounds. than for covalent ...

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malleable, and ductile. 19.1 ... gases or brittle solids at room temperature. ... •Most nonmetals can form ionic and covalent compounds.
The giant covalent structure of diamond. Carbon has an electronic arrangement of 2,4. In diamond, each carbon shares electrons with four other carbon atoms - forming four single bonds. In the diagram some carbon atoms only seem to be forming two bonds (or even one bond), but that's not really the case.

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You can also use the periodic table to determine the charge an ion will have once the bond forms. Covalent Dot Structures Worksheet Draw the dot structures for the following covalent compounds. Remember covalent bonds form between a nonmetal and another nonmetal. This type of bond involves the sharing electrons to form molecules.
mal·le·a·ble (măl′ē-ə-bəl) adj. 1. Capable of being shaped or formed, as by hammering or pressure: a malleable metal. 2. Easily controlled or influenced: "The British ...
3.2 (b) Molecules and covalent compounds Covalent bonding involves sharing of electrons between non-metallic atoms. By sharing all the bonded atoms gain a full outer shell of electrons and the particle they form is a covalent compound. Single covalent bonds: In a single covalent bong, one pair of electrons is shared between the two atoms. One
C. Comparison of Ionic and Covalent Compounds. 1. The force holding ions together is very strong attractive forces. There is very little force of attraction between covalent molecules. 2. Ionic have higher BP, MP, and hardness. This is due to higher attraction between particles. 3. Ionic does not vaporize at room temp. 4. Ionic-Brittle ...
Metalloids can form ionic and covalent bonds with other elements and can have metallic and nonmetallic properties. Some metalloids can conduct electricity better than most nonmetals, but not as well as some metals, giving them the name semiconductor. * Hydrogen A diatomic molecule consists of two atoms of the same element in a covalent bond.

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