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The Periodic Table Overview

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Questions and Answers

What is the main purpose of the Periodic Table of Elements?

To list the names of all known elements

To organize elements based on their properties (correct)

To provide historical information about elements

To break down elements into simpler substances

Why did Johann Dobereiner create triads of elements?

To group elements alphabetically

To study the historical origins of elements

To identify elements with similar properties (correct)

To organize elements by atomic mass

What was a major limitation of Johann Dobereiner's triad theory?

It could not explain the behavior of the elements in a triad

It did not classify elements based on their atomic mass

It failed to consider the atomic number of elements

It was not accepted by the scientific community (correct)

How are elements arranged within a box on the Periodic Table?

By their atomic number and symbols Signup and view all the answers

What does the atomic mass provide for each element on the Periodic Table?

Average mass of all isotopes of the element Signup and view all the answers

What common properties do metals share?

Malleability, ductility, good conductors of heat and electricity Signup and view all the answers

What is the general trend for ionization energy as you go across a period?

Increases Signup and view all the answers

What was the key observation that led to the creation of the Law of Octaves by John Newlands?

Every eighth element had similar properties. Signup and view all the answers

Which elements tend to have a high oxidizing nature?

Atoms with small atomic radius, large number of valence electrons, and high ionization energy Signup and view all the answers

How did Dmitri Mendeleev initially organize the elements in the periodic table?

By increasing atomic mass Signup and view all the answers

How does metallic character change as you move down a group on the periodic table?

Increases Signup and view all the answers

What was Henry Moseley's contribution to the periodic table's organization?

Arranged elements by increasing atomic number Signup and view all the answers

How many periods are there in the periodic table?

Seven Signup and view all the answers

Which elements would be expected to have a large electronegativity based on their location in the periodic table?

Elements in the upper right corner Signup and view all the answers

What is the significance of the 'staircase' on the periodic table?

It separates metals and non-metals. Signup and view all the answers