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How did Mendeleev drcide where to place arsenic and selenium on the periodic table?
Mendeleev placed arsenic and selenium on the periodic table based on their chemical properties and atomic masses. He arranged elements by increasing atomic mass and grouped them by similar properties. By doing so, he could predict the properties of undiscovered elements and fill in gaps in the periodic table.
How did Mendeleev decide where to place arsenic and selenium?
Dmitri Mendeleev placed arsenic and selenium in his periodic table based on their chemical properties and similarities to other elements. He prioritized their behavior and valence over atomic mass, which led him to position them in a way that reflected their similarities with phosphorus and sulfur, respectively. This placement allowed him to maintain the periodic trends he observed, even if it meant deviating from a strict order by atomic mass. Mendeleev's decisions were guided by the idea that elements with similar properties should be grouped together.
Did Arsenic create the first periodic table?
Arsenic did not create the first periodic table. The first periodic table was created by Dmitri Mendeleev, a Russian chemist, in the 1860s. Other scientists had organized elements in other ways prior to the invention of Mendeleev's periodic table, but the other methods were criticized and did not catch on.
What is the atomic radius of selenium if germanium's is 122 pm and arsenic's is 120 pm?
The atomic radius of selenium can be estimated to be approximately between 116 pm and 118 pm based on the trends in atomic radii going down a group in the periodic table. This is because atomic radius generally increases as you move down a group, so selenium's atomic radius would be smaller than arsenic's and germanium's.
Who found the element arsenic?
Arsenic was discovered in 1250 by Albertus Magnus. The place of discovery is unknown. x
How did Mendeleev drcide where to place arsenic and selenium on the periodic table?
Mendeleev placed arsenic and selenium on the periodic table based on their chemical properties and atomic masses. He arranged elements by increasing atomic mass and grouped them by similar properties. By doing so, he could predict the properties of undiscovered elements and fill in gaps in the periodic table.
How do toxic is selenium?
Elemental selenium is nontoxic, hydrogen selenide and other selenium compounds are extremely toxic and resemble arsenic in their physiological reactions.
How many electrons selenium would arsenic lose or gain when forming an ion?
Selenium typically gains two electrons to achieve a stable electron configuration, forming the Se2- ion. Arsenic typically loses three electrons to achieve a Noble Gas electron configuration and forms the As3+ ion.
Did Arsenic create the first periodic table?
Arsenic did not create the first periodic table. The first periodic table was created by Dmitri Mendeleev, a Russian chemist, in the 1860s. Other scientists had organized elements in other ways prior to the invention of Mendeleev's periodic table, but the other methods were criticized and did not catch on.
What element is a period 4 nonmetal known since 1650?
In 1649, Johann Schröder published two methods for preparing elemental Arsenic. So the answer is Arsenic. Yahoo anwers.com
What is the atomic radius of selenium if germanium's is 122 pm and arsenic's is 120 pm?
The atomic radius of selenium can be estimated to be approximately between 116 pm and 118 pm based on the trends in atomic radii going down a group in the periodic table. This is because atomic radius generally increases as you move down a group, so selenium's atomic radius would be smaller than arsenic's and germanium's.
Where does Arsenic and Old Lace take place?
"Arsenic and ols lace" is cast in Brooklyn, NY.
What is a good conductor of electicity a. Arsenic b.Bromine c.Phosphorous d.Selenium e.Sulfur?
Among the options provided, selenium is the best conductor of electricity. It is a semiconductor, meaning it can conduct electricity under certain conditions, unlike arsenic, bromine, phosphorus, and sulfur, which are generally poor conductors. Selenium's electrical conductivity makes it useful in various electronic applications, including photodetectors and solar cells.
Who found the element arsenic?
Arsenic was discovered in 1250 by Albertus Magnus. The place of discovery is unknown. x
What has the author Ghali Ghazi N Barakati written?
Ghali Ghazi N. Barakati has written: 'The electronic properties of bulk amorphous arsenic-selenium alloys'
What place is Dmitri Mendeleev in the birth order?
Mendeleev was born in the village of Verkhnie Aremzyani, near Tobolsk in Siberia.
What place was Dmitri Mendeleev in the birth order?
Mendeleev was born in the village of Verkhnie Aremzyani, near Tobolsk in Siberia.
