In the period from about 1800 to 1865, the atomic weights of many elements were accurately...

In the period from about 1800 to 1865, the atomic weights of many elements were accurately measured. Why was this important to Mendeleev’s formulation of the periodic table?

Solutions

Expert Solution

Dimitri Mendeleev was a Russian chemist ( Father of periodic table).

He, by his own analysis, found that elements repeat their physical and chemical properties periodically as the atomic weight gets increasing. Then he put elements with similar properties in a particular column and in rows maintain the atomic weights in ascending order.

So in some columns or rows of that table there were some empty spaces. This doesn't left the father of periodic table demotivated, rather he guessed that elements in those empty spaces hadn't been found yet.

For example, he predicted the undiscovered element below the Aluminium. In 1875, it was found to be Gallium.

Since the spaces came to his knowledge after arranging the elements as per their properties and atomic weight is increasing in a pattern way in a row, he predicted the atomic weights very accurately.

Due to repeatitive nature, the table was named as 'Periodic table'.

queen_honey_blossom answered 1 year ago

Next > < Previous

Related Solutions

Using the atomic weights of selected elements given below, find the formula weights for the following...

Using the atomic weights of selected elements given below, find the formula weights for the following compounds: Atomic weights of selected elements Ca = 40 g moL-1, C = 12 g moL-1, O = 16 g moL-1, H = 1 g moL-1, P = 31 g moL-1, K = 39 g moL-1 Si = 28 g moL-1, Al = 27 g moL-1, S = 32 g moL-1, N = 14 g moL-1 Example: (NH4)2SO4 Element no. of moles Atomic...

1. What were the elements behind the successful acceleration of industrialization after 1865. 2. What were...

1. What were the elements behind the successful acceleration of industrialization after 1865. 2. What were factors that caused ex-slave states in the south lag behind the north in participation in this acceleration of industrialization? 3. Why were the creation of the Interstate Commerce Commission (ICC) and passage of the Sherman Anti-trust Act of 1890 so important to the creation of a fair business climate.

Why the late 1800's were called the "Gilded Age". Do you think this period had a...

Why the late 1800's were called the "Gilded Age". Do you think this period had a large impact on the United States? If so, why?

Consider the atomic radius of the atoms in Period 2. Notice that the radius decreases from...

Consider the atomic radius of the atoms in Period 2. Notice that the radius decreases from left to right accross the period, even though the number of valence electrons increases. Why doesn't atomic radius increase across a period? (Hint: consider effective nuclear charge.)

If Thomson, Rutherford and Bohr were to discuss about the atomic model, (a) how would Thomson...

If Thomson, Rutherford and Bohr were to discuss about the atomic model, (a) how would Thomson explain his atomic model? (b) what experimental evidences would Rutherford put forward to refute Thomson’s atomic model? (c) why would Bohr reject Rutherford’s atomic model? Discuss his solution to the Rutherford atomic model predicament.

Evaluation of Romanesque Art There were many prominent monasteries in the Romanesque period

Evaluation of Romanesque Art There were many prominent monasteries in the Romanesque period that thrived in their own rights and established a relationship with the masses. Consider these prominent monasteries, discuss their art and cathedrals and how they helped establish Christianity through architecture and illuminated manuscripts. Investigate one specific art example, and use your evaluation to conclude how this item in fact helps to establish this important relationship.

Think about the elements of successful social movements that you have now seen employed by many...

Think about the elements of successful social movements that you have now seen employed by many historical interest groups; and consider, too, the common ways that all these movement "moments" are framed and mythologized by various media. Discuss a connection you see between the reality -- or the portrayal -- of the civil rights movement, the g*y rights movement, and one of the global human rights initiatives. Then discuss this reality or portrayal in terms of a current movement (like...

Weights (kg) of poplar trees were obtained from trees planted in a rich and moist region....

Weights (kg) of poplar trees were obtained from trees planted in a rich and moist region. The trees were given different treatments identified in the accompanying table. Use a 0.05 significance level to test the claim that the four treatment categories yield poplar trees with the same mean weight. Is there a treatment that appears to be most effective? No TreatmentNo Treatment FertilizerFertilizer IrrigationIrrigation Fertilizer and IrrigationFertilizer and Irrigation 1.13 0.82 0.07 0.91 0.52 0.82 0.62 1.45 0.53 0.38 0.08...

1. Using only the periodic table arrange the following elements in order of increasing atomic radius: (write order from smallest to largest)

1. Using only the periodic table arrange the following elements in order of increasing atomic radius: (write order from smallest to largest) a) polonium, selenium, sulfur, oxygen b) gallium, indium, thallium, aluminum c) silicon, sodium, sulfur, argon 2. Using only the periodic table arrange the following elements in order of increasing ionization energy: (write order from lowest to highest) a) polonium, selenium, sulfur, oxygen b) gallium, indium, thallium, aluminum c) silicon, sodium, sulfur, argon 3. a) Write the complete...

Think about the different elements of benchmarking and auditing that make these two disciplines distinct from...

Think about the different elements of benchmarking and auditing that make these two disciplines distinct from each other. Discuss why an employee invited to participate in each of these kinds of activities might have a more favorable perspective of one over the other. What differences might drive such perception differences and what might a quality engineer do to alleviate some of the concerns raised by the more negative perceptions?

Subjects