Using the periodic table lesson 1
periodic table
A chart of the elements arranged into rows and columns according to their chemical and physical properties
Group
A column in the periodic table
True
After arranging the known elements in a periodic table, Mendeleev noticed large gaps between some elements. He predicted that scientists would find elements to fit into these spaces. Mendeleev's predictions were ____
Right
As you read from left to ______ across the periodic table, atomic number increases by one for each element
Metalloids
Between the nonmetals and metals on the periodic table are the ____________, which have properties of metals and nonmetals
Atomic mass
Dimitri places the elements in rows of increasing ____________
Similar
Elements in the same group have similar chemical properties, which means they react with other elements in ________ ways
Nearby
Elements that are __________ each other on the periodic table share similar properties
Melting point
For example, Mendeleev noticed patterns in the _______________ of elements, the temperature at which a solid changes to liquid
Increasing
In the early 1900s, Henry Moseley found that the problem with Mendeleev's table could be solved by ____________ atomic number
Dimitri Mendeleev
In the mid-1800s, Russian chemist and teacher ________ ________________ created a table to help classify the elements by their properties
Periods
Rows in the periodic table
New
Scientists use the periodic table to predict the properties of ____ elements they create
Element key
Shows the element's name, atomic number, chemical symbol, state of matter, and atomic mass
Read
The atomic number increases as you _______ from left to right on the periodic table
Sequential order
The atomic number is used to create the ________________________ of elements
Periodic
The elements in Mendeleev's table showed repeating patterns; _________ is a word used to describe such patterns
Atomic number
The number of protons in the atoms of an element
Elements
The periodic table can be used to determine how all ____________ are related to one another
At room temperature, they are solid
What can you learn about metals from the periodic table?
They are not solid at room temperature
What can you learn about nonmetals on the periodic table?
Elements in the same group have similar chemical properties
What is true about elements in the same group?
The physical and chemical properties change
What is true about the characteristics of elements in a period from left to right on the periodic table?
The middle
Where a metalloids on the periodic table?
Left
Where are metals on the periodic table?
Right
Where are nonmetals on the periodic table?
Placement
You can identify the properties of an element by studying its _________ on the periodic table
