Metals, Nonmetals, Metalloids
Group Properties / PT Trends
History of the Periodic Table
Random
Organization
100
Metals are this quality, meaning that they can be made into wires.
What is ductile
100

Group 1 elements, soft, silvery appearance, highly reactive

What is Alkali metals?

100
This Russian chemist was the first to organize elements based on their properties.
Who is Dmitri Mendeleev?
100
Palladium (Pd) has an atomic number of 46 and a average mass of 106.42, which means Palladium has this many protons.
What is 46?
100
The vertical columns of elements are called this term.
What are groups or families.
200
Nonmetals can be found on this side of the zig-zag line on the periodic table.
What is the right.
200

Group 18 elements, unreactive, full outer shell

What is noble gases?

200
Mendeleev arranged elements in this order.
What is increasing atomic mass?
200
This is the chemical symbol for Calcium.
What is Ca?
200
The horizontal rows of elements on the periodic table are called this term.
What are periods?
300
This is a characteristic of metals that allows them to be formed into different shapes.
What is malleable?
300

Group 2 elements, harder, stronger, higher melting points than Group 1

What is Alkaline Earth metals?

300
In the early 1900s, this British scientist rearranged Mendeleev's periodic table.
Who is Henry Moseley?
300
Elements in this category are often solid (besides Mercury) at room temperature.
What are metals?
300
Elements in the same group or family have similar physical and chemical properties due to them having the same number of this.
What are valence electrons.
400
Due to their having properties of both metals and nonmetals, elements of this category are used to make semiconductor chips in computers.
What is metalloid?
400

Group 17, highly reactive nonmetals, salt formers

What is halogens?

400
Moseley arranged the periodic table based on this property.
What is increasing atomic number (# of protons)
400
These are the subatomic particles found on the outermost energy shell of an element.
What are valence electrons?
400
Elements follow a predictable density pattern as you go from left to right within a period. Elements found in this position of the period are the most dense.
What is the middle?
500
Elements in this category are often dull and brittle.
What is nonmetals.
500

This is trend for atomic radius from left to right across a period.

What is atomic radius decreases

500
The periodic table today is organized by this.
What is atomic number?
500
These gases have 8 valence electrons and therefore are nonreactive.
What are the noble gases?
500
Sodium (Na) and Potassium (K) react very similarly with water. Both sodium and potassium have one valence electron, meaning they are arranged in this same part of the periodic table.
What is group?
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