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Periodic Table of Elements
Science Chapter 5 final exam study guide
Terms in this set (83)
The first elements to be discovered were mainly gases
Other scientists before Mendeleev tried to arrange the elements logically
Mendeleev needed to organize information for 63 known elements.
An arrangement of elements into columns, based on a set of properties that repeat row to row
In 1789, Antoine Lavoisier attempted to group elements on to which categories?
Metals, nonmetals, gases, and earths
What did Antoine Lavoisier not discover?
The chemical explaination of electric charges
In a periodic table, a set of properties repeats from
Row to row
Mendeleev got his ideas for the arrangement from what popular card game?
Mendeleev arranged the known chemical elements in a table according to increasing
An important feature of the periodic table is that elements with similar properties line up into
Mendeleev gave the name eka-aluminum to an
Unknown element he predicted would be similar to aluminum
Regular patterns found in periodic table are known as periodic
Unlike the chemists before him, Mendeleev did not hesitate to include _____ to his periodic table
In 1872, Mendeleev studied all of the elements of his day and tried to form comparisons based on their
Mass and reactivity with oxygen and hydrogen
The usefulness of Mendeleev's periodic table was confirmed by
The discovery of elements that he predicted
What is an example that cannot be arranged periodically?
Ingredients and instructions in a recipe
Why were the elements gallium, scandium, and germanium important to Mendeleev?
They were predicted by Mendeleev based upon the periodic table
Mendeleev predicted that the undiscovered element he called eka-aluminum would have a melting point similar to
Mendeleev's periodic table was useful because it enabled scientists to predict properties of undiscovered
When you move from left to right across any row of the periodic table atomic mass will_____ and when you move from top to bottom of any column atomic mass will_______
What is not found on a typical table?
An element's color
What list of elements contains only metals?
Iron, copper, and silver
At room temperature, none of the metals are
Some metals are ductile which means that they
Can be formed into wire
At room temperature, most of the elements in the periodic table are
Solid, naturally occurring, metals
Most of the elements on the periodic table are ______ at room temperature
A malleable element with good conductivity that is a solid at room temperature is a_____
Most of the elements on the periodic table fall into what class?
Most of the elements on the periodic table are_______
What are in the same period?
Aluminum, silicon, and chlorine
What are in the same group?
Lithium, potassium, and cesium
What element is a alkali metal?
What element is an alkaline earth metal?
What element is a halogen?
What element is a noble gas?
Groups are the _____ of the periodic table that correspond to the number of _____ within the atom.
Columns, valence electrons
Atoms of the most reactive elements tend to have _______
One or seven valence electrons
As you move from left to right across a period, the number of valence electrons
As you move from top to bottom of a group,the number of valence electrons
Stays the same
Group 6A elements have
More valence electrons
An alkali metal has one valence electron, while an alkaline earth metal has
A halogen has seven valence electrons while most noble gases have
The most reactive elements are
Lithium, sodium, potassium
The most reactive metal is
The most reactive nonmetal is
The reactivity of the alkali earth metals increases from
Top to bottom
The reactivity of the halogens increase from
Bottom to top
Group 1A contains the
Most reactive metals
Group 7A contains the
Least reactive metals
The least reactive metals are
Two highly reactive elements in period 2 are the metal lithium and
The least reactive element in period 3 is the
What halogen is most reactive?
Some highly reactive elements are stored in ______ to keep from reacting
What element is not found in nature only as compound?
The most reactive element in group 1A out of the following is
The most reactive element in group 2A out of the following is
The most reactive element in group 7A out of the following is
Phosphorus has _____ valence electrons and _____ energy levels
Cesium has ____ valence electrons and _____ energy levels
What is true about the metalloid silicon?
Silicon's ability to conduct electricity changes with temperature
Which of the following metals is a liquid at room temperature? Chromium, nickel, or mercury
What does not apply to metals?
Most metals are brittle
A row that goes across on the periodic table is called a
On the periodic table, a column that goes down is called a
The most reactive element in group 2A out of the three is
What is not true about the elements fluorine, chlorine, and iodine?
They are similar to noble gases
What does not apply to nonmetals?
Most nonmetals are brittle in the solid state
Periods are the _______ of the periodic table that correspond to the number of ______ within the atom
Rows, energy levels
An element in period 3 and group 2A has
3 rings and 2 electrons on the outer ring
An element in period 2 and group 3A has
2 rings and 3 electrons on the outer ring
An element on period 4 and group 2A has
4 rings and 2 electrons on the outer ring
A Bohr model with 1 ring is found in period
A Bohr model with 1 ring is found in group
A Bohr model in period 1 and group 8A is
A Bohr model with 3 rings is found in period
A Bohr model with 3 rings is found in group
A Bohr model in period 3 and group 8A is
What is not a property of the noble gases?
They all have 8 valence electrons
What out of the three Group 1A elements is most reactive?
What out of the three Group 7A elements is most reactive?
The elements of ______ are essentially non-reactive
At room temperature, none of the metals are
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