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Mendeleev placed iodine in the same group as fluorine because both elements have similar chemical properties, such as forming compounds with similar stoichiometry and showing similar reactivity patterns. This classification allowed Mendeleev to identify a pattern in the properties of elements and lay the foundation for the modern Periodic Table.
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Why did Mendeleev swap Tellurium and Iodine around?
Mendeleev swapped Tellurium and Iodine in his periodic table to maintain the chemical properties of elements within the same group. Even though Tellurium has a higher atomic mass than Iodine, their chemical properties are more similar when placed in the switched positions, following Mendeleev's periodic law.
What place was Dmitri Mendeleev in the birth order?
Mendeleev was born in the village of Verkhnie Aremzyani, near Tobolsk in Siberia.
What is the place of birth for fluorine?
Fluorine was discovered by Henri Moissan in 1886 in France.
What happens to iodine when you place its covered container in a warm place?
Placing iodine covered in a warm place could cause sublimation to a cool spot on the container - if the temperature is even on the container walls, if the temperature is warm enough the violet colour of gaseous iodine may be visible.
Which element from Mendeleev's seventh column is now considered out of place?
In the past, manganese was erroneously located.
Why did Mendeleev swap Tellurium and Iodine around?
Mendeleev swapped Tellurium and Iodine in his periodic table to maintain the chemical properties of elements within the same group. Even though Tellurium has a higher atomic mass than Iodine, their chemical properties are more similar when placed in the switched positions, following Mendeleev's periodic law.
Why did Mendeleev place zinc in the same group as calcium?
They both have 2 valence electrons and have similar reactivity.
Why did mendeleev place tellurium before iodine?
Iodine's atomic number is 53 whereas tellurium's is 52. Atomic number is basically the number of protons that an element has. Therefore, as iodine has more protons than tellurium, it appears later in the table.
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.
What happen to iodine when you place its covered container in a warm place?
When you place a covered container of iodine in a warm place, the iodine will sublimate, meaning it will change from a solid to a gas without passing through the liquid phase. This is due to the low melting point of iodine, which is below room temperature.
How did mendeleev place arsenic and selenium?
Mendeleev placed arsenic before selenium in his periodic table based on their atomic weights and chemical properties. Arsenic has a lower atomic weight and exhibits similar chemical behavior to other elements in its group, making it a better match for the position before selenium.
What is the place of birth for fluorine?
Fluorine was discovered by Henri Moissan in 1886 in France.
What is the test for chlorophyll?
place a leave in a glass of iodine (brown colour), if it turns the iodine green its means chlorophyll is present. (iodine will evaporate the chlorophyll out of the plant)
How is fluorine different from helium?
Fluorine is a chemical element with atomic number 9, while helium is element number 2. Fluorine is a highly reactive nonmetal, while helium is a noble gas known for its inertness. Fluorine is commonly found in compounds like fluorides, while helium is often used in balloons and cryogenics due to its low boiling point.
What happens to iodine when you place its covered container in a warm place?
Placing iodine covered in a warm place could cause sublimation to a cool spot on the container - if the temperature is even on the container walls, if the temperature is warm enough the violet colour of gaseous iodine may be visible.
What happens to iodine when you place it's covered container in a warm place?
Placing iodine covered in a warm place could cause sublimation to a cool spot on the container - if the temperature is even on the container walls, if the temperature is warm enough the violet colour of gaseous iodine may be visible.
