Chemical Elements and Atomic Weights Quiz

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Which scientist is credited with inventing the periodic table of elements?

Mendeleev (correct)

Dobereiner

Rutherford

Bohr

What is the significance of Mendeleev's periodic table in terms of atomic masses?

It accurately predicted the atomic masses of all known elements.

It reordered elements solely based on their atomic masses.

It revealed some vacant places where atomic masses were predicted for unknown elements. (correct)

It showed a clear correlation between atomic masses and chemical properties.

What do the molecular formulas like R2O, R2O3, etc., represent in Mendeleev's periodic table?

Predicted atomic masses of unknown elements (correct)

Groupings based on atomic masses

Element categories based on reactivity

Atomic numbers of elements

Which element group is represented by RH4, RO2, and RH3 in Mendeleev's periodic table?

Group V Signup and view all the answers

Which scientist is associated with the concept of Dobereiner's triads?

Mendeleev Signup and view all the answers

What is the characteristic property of the eighth element in a triad according to Dobereiner's concept?

Properties of the eighth element similar to the first Signup and view all the answers

What is the atomic number of an element with electron configuration 2,8,2?

12 Signup and view all the answers

Which block of the modern periodic table are nonmetals typically found in?

P-block Signup and view all the answers

What was the basis of Dobereiner's classification of elements into triads?

Atomic mass Signup and view all the answers

How did Dobereiner arrange the three elements in a triad?

In increasing order of atomic mass Signup and view all the answers

Why were all the known elements not able to be classified into Dobereiner's triads?

Due to the limitation of only considering atomic mass Signup and view all the answers

From the given groups of elements, which group can be identified as a Dobereiner's triad?

Mg (24.3), Ca (40.1), Sr (87.6) Signup and view all the answers

How can the history of philosophy be useful in understanding ideologies?

By explaining the origin of various ideologies and intellectual traditions Signup and view all the answers

Why is knowledge of the history of language valuable in understanding philosophy?

To explain the philosophical expressions vividly Signup and view all the answers

What drives scientific discoveries and inventions?

Human efforts to fulfill a need and curiosity Signup and view all the answers

What does the history of science help in understanding?

The cause-effect chain leading to scientific discoveries Signup and view all the answers

What is another name for 'Applied History' as mentioned in the text?

Public History Signup and view all the answers

How does 'Public History' help overcome misconceptions about the usefulness of studying history?

By making history meaningful in everyday life for people Signup and view all the answers

Which institute mentioned in the text has an independent department named 'Centre for Public History'?

Srushti Institute of Art Design and Technology Signup and view all the answers

What does 'Applied History' focus on according to the text?

Applying history for the benefit of people in contemporary and future contexts Signup and view all the answers

What is one of the key roles of applied history in public training programmes?

Creating social awareness about historical artifacts Signup and view all the answers

Which professionals are mentioned as necessary for projects in the field of applied history?

Architects, engineers, legal experts Signup and view all the answers

What is the purpose of establishing a centre for dissemination of 'films culture' as mentioned in the text?

To preserve heritage films for future generations Signup and view all the answers

Which experts are NOT mentioned as required for various fields related to applied history?

Astronomers Signup and view all the answers