Ch5 study Guide

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chemical Bond

the force that holds two atoms together

a mixture is different from a comupund because each substance in a mixture:

retains its own properites

a compound differs from a mixture because it:

always contains the same element in the same proportion

which compound is formed from a tight network of oppositely charged ions

Salt, NaCl

which substance do the molecules have the strongest attractions to one another?

sugar, a solid

gas take up alot of space because:

their molecules have very little attraction for one another

often atoms join so that each atom will have :

an outermost energy level thatis full of electrons

when 2 hydrogen atoms bond, the postive nucleus of one atom attracts the

negative electrons of the other atom

an ionic bond is a bond that forms between:

ions with opposite charges

Covalent bonds are formed between:

nonmetal atoms

in a metallic bond , the nucleus of one atom is attracted by a nearby atom's :

electron

copper is a good conductor of electicity because its elctrons:

are free to move from atom to atom

solid ionic compounds have very high melting points because they

are made of elements that are locked tightly together

which type of bond do atoms share electrons?

covalent bonds

it is possiable for different covalent compounds to have the same empirical formula because empirical formulas represents

a ratio of atoms in the same compound

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