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Science Chapter 9 Lesson 1

Terms in this set (30)

Periodic Table
A chart of the elements arranged into rows ans colums according to their physical and chemical properties.
Group
A vertical column on the periodic table.
What are groups numbered from?
1-18
Periods
The horizontal rows on the periodic table.
Where does the atomic number increase by one in what?
Periods
The physical and chemical properties change as you move across in what?
Periods
What is the difference between groups and periods?
Groups are the columns and the periods are the rows.
Gas Symbol
Balloon
Liquid Symbol
Tear drop
Solid Symbol
Cube
Synthetic Symbol
A little circle inside a big circle
What is on a element key?
The element name, atomic number, symbol, state of matter, and atomic mass.
What is the difference between Mendeleev's and Moseley's versions of the periodic table?
Mendeleev's table had organized the elements by their atomic mass. Moseley's table had organized the elements by their atomic number.
What do Mendeleev and Moseley's period table have in common?
They both organized their table from the lowest to the highest elements.
Why did Mendeleev have gaps in his periodic table?
He predicted that scientists would discover elements that would fit into those spaces.
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