Testing Concepts
elements in group 3-12 of the periodic table? silvery solids with low densities and low melting points found in Group 1? Elements that show properties of both metals and nonmetals?
transition elements. Alkali metals. Metalloids.
The most active metals are in the noble gas family
The nonmetals are not very important
F alkali / group 1
F very important
what is the name for AL
what is the number for oxygen
what is the symbol for fluorine
allminum
8
balloon
Gas at room temp
can be drawn out in thin wire
nonmetal
metal
After completing his table, why did Mendeleev suspect there were elements yet to be discovered?
He saw gaps in his table
Row of elements in the periodic table whose properties change gradually and predictability? Only Nonmetal in Group 1? Elements that show moderate electrical conductivity?
periods. hydrogens. semiconductors
Helium, Argon, and Radon are members of the Halogen family
Silicon and germanium are used in electronics as semiconductors
F noble gases
T
what is the number for carbon
what is the letter for phosphorus
what is the number for chlorine
6
P
17
a poor conductor of electricity
used for computer chips
nonmetal
metalloid
Explain why you would not expect to be able to combine magnesium and argon to produce a useful substance.
Argon is a noble gas and it does not mix readly with other elements
Another name for group 2 elements?Series of radioactive elements?Most chemically inactive group of elements?
Alkaine Earth Metals. Actinides. Noble gases
A period contains elements that have similar properties
The element silver is widely used in Dentistry
F group
T
what is the symbol for silicon
what is the number for arsenic
what does Br stand for
block
33
Bromine
can be used as a semiconductor
metalloid
would you expect the insulation around an electrical outlet to he made of metal, nonmetal or metalloid
nonmetal because anything else would conduct electricity
Basis for arranging elements in modern periodic table? Group of elements that form salts? able to be hammered into thin sheets?
Atomic number.Halogens.Malleable
Bromine and Mercury are liquids at room temperature
All transition elements are metals
T
T
what is the letters for germanium
what does s stand for
GE :0
sulfer
a transition element
metal
how does reading across a period of the electrical outlet
a Lanthaniem they are soft metals
b actinium they are radioactive
Series of elements that are sometimes called rare earths? Elements that are gases or brittle solids and poor conductors of heat and electricity? Most elements fall into this classification
Metalloids.Nonmetals.metals
Lithium and sodium are members of the Alkali metal family
Most of the actinides occur naturally in Earth's crust
T
F 3
what does N stand for
what is the symbol for selenium
nitrogen
block
can be hammered into thin sheets
has a dull appearance and is brittle
metal
nonmetal
How does reading across a period of the periodic table compare with reading down a group of the table