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State the periodic law on which Mendeleev's Periodic table was based and why and how this periodic law changed?
Mendeleev's Periodic Table was based on the periodic law which states that the properties of elements are a periodic function of their atomic masses. This law changed with the discovery of atomic number by Moseley which stated that the properties of elements are a periodic function of their atomic numbers, leading to a more accurate and modern periodic table based on atomic number.
Were are the lanthanides placed on the periodic table?
The lanthanides are a series of elements that are placed at the bottom of the periodic table. They are located in the f-block, specifically in the period below the main body of the periodic table. The lanthanides have atomic numbers 57-71.
Which statement about the development of the periodic table is true?
The periodic table was developed by Dmitri Mendeleev in 1869. Mendeleev organized the elements by their atomic mass and observed that elements with similar properties occurred at regular intervals. This arrangement formed the basis for the modern periodic table.
Which element family is usually shown separated frome the main part of the periodic table?
f block elements (lanthanides and actinides) are placed below the periodic table
Does h stand for helium on the periodic table?
No, the symbol "H" stands for Hydrogen on the periodic table. The symbol "He" stands for Helium on the periodic table.
Why its called periodic table?
Because the elements progress in a periodic function.
How does atomic number explain the arrangement of the periodic table?
According to the modern periodic table "Elements are the periodic function of their atomic number".They are arranged in increasing atomic no. in the periodic table.
What are the three main classes of elements in a periodic table?
Three main classes are:MetalsNon metalsTransition elementsThey are present in periodic table.
Words that describe a periodic table?
Basic information about and classifications of gallium are on the periodic table.
How many periods are there in the main body of a periodic table?
There are 7 periods in the modern periodic table.
What are the main metals in the periodic table?
The main metals in the periodic table are iron, copper, zinc, silver, gold, and platinum. Metals are typically found on the left side of the periodic table and are known for their conductivity, malleability, and luster.
What is the main advantages of the periodic table?
It organizes the elements.
What is the periodic table considered to be periodic?
The properties of elements are periodic function of their atomic number. The properties are repeated after certain interval.
Main idea of mendeleevs first periodic table?
In Mendeleev's periodic table, the elements were arranged in the increasing order of their atomic masses and repeating periodic properties.
What are the four main families on the periodic table?
they are all important
How many periods are there in main body of periodic table?
7
How many main groups are in the periodic table elements?
13
