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Questions and Answers
Which is classified as an inner transition element?
Which is classified as an inner transition element?
- Copper
- Calcium
- Helium
- Fermium (correct)
Moseley made revisions to the periodic table that resolved some of the problems with Mendeleev's version. Which of these was a result of his revisions to the periodic table?
Moseley made revisions to the periodic table that resolved some of the problems with Mendeleev's version. Which of these was a result of his revisions to the periodic table?
- The revised periodic table could account for the discovery of new elements.
- The revised periodic table could account for variations resulting from isotopes. (correct)
- Scientists could begin to write new information onto each element.
- Scientists could begin to place the table on a single sheet of paper.
Which scientist established the law of octaves?
Which scientist established the law of octaves?
- Antoine Lavoisier
- John Newlands (correct)
- Henry Moseley
- Dmitri Mendeleev
Which property would cesium most likely have?
Which property would cesium most likely have?
How did the work of Dmitri Mendeleev differ from that of John Newlands in the development of the periodic table?
How did the work of Dmitri Mendeleev differ from that of John Newlands in the development of the periodic table?
Who is credited with creating the first periodic table?
Who is credited with creating the first periodic table?
Who wrote the first modern chemical textbook?
Who wrote the first modern chemical textbook?
Which element is a halogen?
Which element is a halogen?
Which is another name for groups of elements?
Which is another name for groups of elements?
Which element is placed in the same period as ruthenium but has a higher atomic number than it?
Which element is placed in the same period as ruthenium but has a higher atomic number than it?
Members of which group easily lose an electron to form a +1 cation?
Members of which group easily lose an electron to form a +1 cation?
Which element has the greatest average atomic mass?
Which element has the greatest average atomic mass?
What is the chemical symbol for magnesium?
What is the chemical symbol for magnesium?
Which element is classified as a noble gas?
Which element is classified as a noble gas?
How was the work of Newlands similar to that of Mendeleev on the periodic table?
How was the work of Newlands similar to that of Mendeleev on the periodic table?
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Study Notes
Inner Transition Elements
- Fermium is classified as an inner transition element.
Moseley's Revisions
- Moseley's revisions improved the periodic table by accounting for isotope variations.
Law of Octaves
- John Newlands established the law of octaves, which organizes elements by similar properties based on atomic weights.
Properties of Cesium
- Cesium is characterized by being ductile; it is not hard, gaseous, or low in reactivity.
Mendeleev vs. Newlands
- Mendeleev's work differed from Newlands' approach by predicting undiscovered elements, showcasing a more advanced understanding of element properties.
Mendeleev's Contribution
- Dmitri Mendeleev is credited with creating the first periodic table, organizing elements by their atomic mass and properties.
First Modern Chemical Textbook
- Antoine Lavoisier is recognized for writing the first modern chemical textbook, establishing foundational concepts in chemistry.
Halogens
- Bromine is identified as a halogen, which includes reactive nonmetals typically found in group 17 of the periodic table.
Groups of Elements
- "Families" is another term used to describe groups of elements within the periodic table, sharing similar characteristics.
Elements in the Same Period
- Silver is an element in the same period as ruthenium but has a higher atomic number.
Alkali Metals
- Alkali metals easily lose an electron to form +1 cations, exemplified by their high reactivity compared to other groups.
Average Atomic Mass
- Tellurium has the greatest average atomic mass among iodine, bromine, and krypton.
Chemical Symbol for Magnesium
- The chemical symbol for magnesium is Mg.
Noble Gases
- Xenon (Xe) is classified as a noble gas, a category of inert gases known for their low reactivity.
Newlands and Mendeleev Similarities
- Both Newlands and Mendeleev arranged elements in increasing order of atomic mass, demonstrating a key method in constructing the periodic table.
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