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The Periodic Table

You will be allowed to use your foldable periodic table on the test.
STUDY
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Where on the Periodic Table are the most metallic elements located?
Bottom left
What are nonmetals?
Nonmetals are elements that have no metallic properties.
Where on the Periodic Table are nonmetals located?
Nonmetals are located on the right.
At room temperature, most nonmetals are in which state of matter?
Gaseous
In which periods are metals located on the Periodic Table?
2-7
List the alkali metals
Lithium, sodium, francium, potassium, rubidium
How is the Periodic Table arranged using atomic numbers?
The atomic numbers increase going from left to right across periods.
Which 4 factors did Mendeleev use to arrange his Periodic Table?
Density, color, melting point, atomic mass
Define periodic table.
The periodic table is a chart of elements arranged into rows and columns (periods and groups) according to their physical and chemical properties.
What is the definition of atomic number?
The number of protons in the nucleus of an atom.
How did Moseley organize his periodic table?
Moseley organized his periodic table by increasing atomic numbers.
Be able to identify an element's name, atomic number, atomic symbol, and atomic mass, and state of matter by looking at the periodic table.
See page 98 of your notes for this.
What are groups on the periodic table?
columns
What are periods on the periodic table?
rows
Explain how scientists are able to determine a synthetic element's properties.
Scientists are able to look at the properties of other elements in the same groups and period to determine the properties of the synthetic element.
Define luster.
the ability to reflect light
Define conductivity.
the ability to conduct heat and electricity
Define ductility.
the ability to be pulled into thin wires
Define malleability.
the ability to be hammered or rolled into thin sheets
Alkali metals are in which group?
Group 1
Do alkali metals react quickly or slowly with other elements?
quickly
Are alkali metals found in nature as elements, in compounds, or both?
Compounds
What type of appearance do alkali metals have?
dull
Are alkali metals soft or hard?
soft
Describe the density of alkali metals.
They have the lowest densities of all of the metals.
What type of metals have the lowest densities?
Alkali metals
How are alkali metals and alkaline earth metals different. Use the following words: group, reactivity (or reactive), density.
Alkali metals are in group 1. Alkaline earth metals are in group 2. Alkali metals are extremely reactive. Alkaline earth metals are very reactive, but not as reactive as alkali metals. Alkali metals have the lowest densities of all metals. Alkaline earth metals have a low density, but it is not as low as alkali metals.
How are alkali metals and alkaline earth metals similar?
They are both found in nature only as compounds. They are both soft metals. They are both silvery in color.
Where on the Periodic Table are Transition Elements located?
They are located in groups 3-12
What are the properties of transition elements?
great strength, high melting points, high densities, less reactive than other metals
What are lanthanides used for?
strong magnets
What are actinides used for?
fuel in nuclear reactions
Describe the arrangement of metals in the periodic table in terms of their properties.
Metallic properties decrease from left to right across the periods.
The human body is made up of mostly (metals, nonmetals)
Nonmetals
96% of the mass of the human body is made up of what 4 elements?
oxygen, nitrogen, carbon, and hydrogen
What are nonmetals?
elements that have no metallic properties
Solid nonmetals have what type of surface?
Dull (no luster)
What is the nonmetal that are in group 14? (you will use your periodic table for this)
Carbon
What are the nonmetal that are in group 15? (you will use your periodic table for this)
Nitrogen, phosphorous
What are the nonmetal that are in group 16? (you will use your periodic table for this)
Oxygen, sulfur, selenium
In which group are the halogens?
group 17
What is the name of the group 17 elements?
Halogens
Are halogens found in nature as elements, in compounds, or as both?
Compounds
With what type or types of elements do halogens react?
Metals and nonmetals
What it the resulting compound called when a halogen reacts with a metal?
Salt
As you move down the halogens group, what happens to the reactivity?
It decreases.
As you move up the halogen group, what happens to the reactivity?
It increases.
In what goup are the Noble Gases?
Group 18
What are the group 18 elements called?
Noble Gases
Why weren't the noble gases included in Mendeleev's periodic table?
They weren't discovered until after Mendeleev constructed his periodic table.
Are noble gases found as elements, in compounds, or as both in nature?
Only as elements.
Explain how hydrogen shows properties of both metals and nonmetals.
In its liquid form, hydrogen conducts electricity like a metal. It is very reactive like an alkali metal. Like some nonmetals, it is a gas at room temperature. Under the conditions found on Earth, hydrogen acts as a nonmetal.
Define metalloid.
an element that has physical and chemical properties of both metals and nonmetals
How are metalloids like metals?
they coduct electricity at high temperatures
How are metalloids like nonmetals?
they stop electricity from flowing at low temperatures
Define semiconductor.
A semiconductor conducts electricity but not as well as a metal does
How is a semiconductor useful?
A semiconductor is useful in electronic devices because it conducts electricity well at high temperatures and stops electricity from flowing at lower temperatures.
Be able to tell an element's atomic number whether it's a metal, nonmetal, or metalloid; and which group and period it is in by using your foldable periodic table.
Use Periodic Table
Be able to list elements from each of the different groups (alkali, halogens, etc.) using your foldable periodic table.
Use Periodic Table