chapter 4

"Tr u e o r F a l s e ? Only the outermost electrons influence the behavior of metals."

True

"Tr u e o r F a l s e ? The micrometer (μm) scale is smaller than the nanometer (nm) scale."

True

" A(n) _____ is any region of a material with measured properties that are constant or changing slowly, with one specific crystal structure."

phase

" A combination of two or more substances that remain unchanged individually and can be easily separated again is known as a(n) _____."

solution

"A(n) _____ is the smallest unit of an element that has the properties associated with that element."

Atom

" A _____ unit cell is cube shaped, with one atom at each corner and one at the exact center of the cube."

Body-centered cubic

"A _____ unit cell is cube shaped, with one atom at each corner and one at the center of each face of the cube"

Face-centered cubic

"Tr u e o r F a l s e ? Elements cannot be broken down into any other substance without destroying the original element."

Flase

"The standard unit of length in the metric system is the _____."

Meter

" A substance gains electrons from another substance during _____."

chemical substance

"A(n) _____ is a combination of two or more substances in which one is completely dissolved in the other, combining them on an atomic scale"

mixture

"Two or more atoms can combine to form a unique substance called a(n) _____."

molecule

"Tr u e o r F a l s e ? In general, metals with hexagonal close-packed structures are more formable than those with body-centered cubic or face-centered cubic structures."

true

tr u e o r F a l s e ? Especially at room temperature, most alloys contain multiple phases."

true

"Metals form small crystals when they solidify, and each individual crystal within the crystalline body is known as a _____."

unit cell