PRELIM: 2 Flashcards
is an element that has the characteristic properties of luster, thermal conductivity, electrical conductivity, and malleability.
Metals
is an element characterized by the absence of the properties of luster, thermal conductivity, electrical conductivity, and malleability.
Nonmetals
No metallic cluster
Nonmetals
Malleable (can be hammered into sheets)
Metals
Almost all are solid
Metals
all ________ are solids at room temperature (258C)
Metals
The only nonmetal that is a liquid at room temperature is _________.
bromine
Physical Properties of a Non-metals
Best conductor of electricity
Dullness
Brittleness
Softness
Many of the _________, such as hydrogen, oxygen, nitrogen, and the noble gases, are gases.
Nonmetals
The majority of the elements are _______. Only 23 elements are nonmetals.
metals
The majority of the elements are metals. Only ____ elements are nonmetals.
23 elements
An analysis of the abundance of the elements in Earth’s crust in terms of metals and nonmetals shows that the two most abundant elements, which account for _______of all atoms, are nonmetals — oxygen and silicon.
80.2% of all atoms
The four most abundant elements in the human body , which comprise more than 99% of all atoms in the body, are nonmetals —
hydrogen, oxygen, carbon, and nitrogen.
An analysis of the abundance of the elements in Earth’s crust in terms of metals and nonmetals shows that the two most abundant elements, which account for 80.2% of all atoms, are nonmetals —
oxygen and silicon.
The four most abundant elements in the human body , which comprise more than _____ of all atoms in the body, are nonmetals — hydrogen, oxygen, carbon, and nitrogen.
99% of all atoms
gas to solid
deposition
solid to liquid
melting
liquid to gas
vaporization
solid to gas
sublimation
liquid to solid
freezing
gas to liquid
condensation
