93 terms

Chapter 17 Elements and Their Properties

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- is the only metal that is not solid at room temperature
mercury
when metals combine with nonmetals, the atoms of the metals tend to lose electrons forming - bonds.
ionic
in - bonding, positively charged metallic ions are surrounded by a cloud of electrons
metallic
a - element is one in which the nucleus breaks down and gives off particles and energy
radioactive
elements in groups 3 through 12 on the periodic table are known as - elements
transition
the two rows of elements that seem to be disconnected from the rest of the periodic table are the -
inner transition metals
an allotrope of carbon that is soft and can be used as a lubricant is -
graphite
the process by which a solid changes directly to a gas without first becoming a liquid is called
sublimation
in the gaseous state - from diatomic covalent molecules
halogens
when hydrogen reacts with active metals, it -
gains an electron
different forms of the same element that have different properties because of different atom arrangements are called
allotropes
at room temperature, most metals are -
solids
an allotrope of carbon that is hard and is often used in jewelry is -
diamond
metals can be used as wire because they are -
ductile
the - often occur in nature as uncombined elements
transition elements
substances that conduct an electric current only under certain conditions are most likely to be-
metalloids
the elements in groups 3 through 12 of the periodic table are the -
transition elements
a group of elements that have two electrons in its outer energy level is the -
alkaline earth metals
hydrogen is grouped with the alkali metals because it
has one electron in its outer energy level
synthetic elements are found in which of he following groups?
actinides
the bonding that occurs when positively charged ions are surrounded by a cloud of electrons is called - bonding
metallic
all synthetic elements-
are not typically found on earth
the only metal is a liquid at room temperature is -
mercury
a synthetic element that is used in smoke detectors is -
americium
bromine is the only halogen and nonmetal that is a - at room temperature
liquid
the iron triad of transition metals includes -
cobalt, iron, and nickel
the ability of metals to reflect light is referred to as -
luster
any element with an atomic number greater than 92 is a -
transuranium element
copper, silver, and gold are - metals
coinage
elements that lie along the stair- step line of the periodic table are -
metalloids
three transition elements in group 12 of the periodic table are -
mercury, zinc, and cadmium
- is the only metal that is not solid at room temperature
mercury
when metals combine with nonmetals the atoms of the metals tend to lose electrons, forming - bonds
ionic
in - bonding, positively charged metallic ions are surrounded by a cloud of electrons
metallic
a - element is one in which the nucleus breaks down and gives off particles and energy
radioactive
elements in groups 3 through 12 on the periodic table are known as - elements
transition
the two rows of elements that seem to be disconnected from the rest of the periodic table are the -
inner transition elements
are metals poor or good conductors of electricity?
good
the elements in group 1 of the periodic table are the - metals
alkali
iron, cobalt, and nickel are known as
iron triad
copper, silver, and gold are known as -
coinage
metals in earth's - must be mined and separated from their cores
crest
most of your body's mass is made of
oxygen
a - molecule consists of two atoms of the same element in a covalent bond
diatomic
are the noble gases stable or unstable?
stable
if a halogen gains an electron from a metal a - if formed
salt
- can form ionic and covalent bonds with other elements and can have metallic and nonmetallic properties
metalloids
different forms of the same element are called -
allotropes
elements having more than 92 protons are called - elements
transuranium
Where are metals located on the periodic table?
left side
What 4 characteristics are common in metals?
ductile, malleable, shiny , and good conductors
are elements that are shiny, malleable, ductile, and good conductors of heat and electricity
metals
can be hammered or rolled into sheets
malleable
drawn into wires
ductile
elements in the same group have the same
properties
When metals combine with nonmetals what ions are made?
metals are positive and nonmetals are negative
positively charged metallic ions are surrounded by a sea of electrons
metallic bonding
Are electrons in free motion?
yes
Where are the alkali metals on the periodic table?
group 1
What are softer than other metals and more reactive?
alkali metals
Do alkali metals occur naturally? Why?
no, because they are highly reactive to oxygen and water
Where are the alkaline earth metals on the periodic table?
group 2
How many electrons in outer level of alkali? alkaline?
1,2
is one in which the nucleus breaks down and gives off particles and energy
radioactive element
What is a magnesium containing compound that enables plants to absorb light and make food
magnesium
calcium carbonate is the major component of what mineral?
limestone
How do transition element occur in nature?
uncombined elements
are the elements in groups 3 through 12 in the periodic table
transition elements
what are main group elements sometimes called?
representive elements
Transition elements can sometimes form what?
colored compounds
iron, cobalt, and nickel form what?
the iron triad
the second most abundant metal in Earth's crust and the most widely used of all metals
iron
copper, silver, and gold are in what group?
group 11
where are zinc, cadmium, and mercury found
group 12
What are the first row of the inner transition elements?
lanthanides
What are the second row of the inner transition elements?
actinides
what are metals found in earth's crust?
minerals
where are minerals found?
ores
Where are nonmetals located on the periodic table? What are three characteristics?
right side, dull, brittle, poor conductors
elements that are usually gases or solids at room temperature
nonmetals
what is the only group of elements that is all nonmetals
noble gases
Nonmetals become - ions when gained electrons from metals
negative
90% if the universe is
hydrogen
consists of two atoms of the same element in a covalent bond
diatomic molecules
Where are halogens located>
group 17
the noble gases exist as
isolated atoms
are elements that have some properties of metals and some of nonmetals
metalloids
What bonds can metalloids form?
both ionic and covalent
what group is the carbon family?
group 14
are different molecular structures of the same elements
allotropes
are elements that conduct an electric current under certain conditions
semiconductors
Where is the nitrogen family located?
group 15
What group is the oxygen group in?
group 16