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What problem is there with Organzing elements by increasing atomic mass?

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What problem is there with Organzing elements by increasing atomic mass?

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If you order it in atomic mass the elements don’t match with the (properties of) elements around it.

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Where do we find metalloids on the periodic table?

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Where do we find metalloids on the periodic table?

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They are atomic numbers 5, 14, 32, 33, 51, 52, and 85. They are in a diagonal line in the p block.

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How does the number of metals compare to the total number of elements?

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How does the number of metals compare to the total number of elements?

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Most elements are metals, which is around 80% of the periodic table.

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Russian Chemist and teacher, who published a table of elements.

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Why do scientists need to be able to organize the elements 

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Why do scientists need to be able to organize the elements 

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They were discovering a lot of elements exist and they needed a way to keep them straight and to logically organize them

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They used the properties especially the chemical

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What problem is there with organizing elements by increasing atomic mass?

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What problem is there with organizing elements by increasing atomic mass?

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The problem was using the atomic mass to organize the periodic table because it didn’t match up to the atomic number and certain elements weren’t in the right order

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Why did scientists need a way to organize the elements?

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Why did scientists need a way to organize the elements?

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They didn’t know the limit on how many elements there are. They also need a logical way to organize the elements.

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Poor conductors of heat and electric current. Solid nonmetals tend to be brittle.

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A set of 3 elements with similar properties

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Where do we find metals on the periodic table

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Where do we find metals on the periodic table

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Metals are found on the left side of the metalloids.

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Describe the process he used to create his table.

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Describe the process he used to create his table.

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Mendeleev developed his table while working on a textbook for his students. he needed a way to show the relationships amoung more than sixty elements. he wrote the properties of each element on a separate notecard, which allowed him to arrange them, until he found the right organization.

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Chlorine bromine iodine

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Which elements are metalloids (list them all)".

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Which elements are metalloids (list them all)".

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Boron, Silicone, Germanium, Arsenic, Antimony, Tellurium, Astatine.

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How did Mosley reorganize the periodic table?

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How did Mosley reorganize the periodic table?

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He put the elements in order of increasing atomic number.

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He was
>The real OG
>Russian chemist and teacher
>published a periodic table in 1896
>hopefully a communist

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What was the problem of organizing elements as triads

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What was the problem of organizing elements as triads

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Not all known elements could be grouped into triads

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Metals are good conductors of heat and electric currents, and they have high luster and sheen. Most metals are malleable and ductile as well.

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How did the early scientist group elements?

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How did the early scientist group elements?

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Chemists used the properties to sort the elements into groups.

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Most nonmetals are gases at room temperature. Poor conductors of heat and electric current

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What pattern did Dobereiner notice in his triads

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What pattern did Dobereiner notice in his triads

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What elementin  each triad tended to have properties with values that fell midway between those of the other two elements

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When the elements are arranged in order of increasing atomic number there is a periodic repetition of their physical and chemical properties

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Where are Nonmetals Found.
-right of Metalloids, upper right corner, as well as Hydrogen

How are these different
-they have opposite properties of metals
-they are poor conductors or heat and electricity-carbon is an exception
-metals are malleable and nonmetals tend to be brittle or naturally occur as gas

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What physical state are metals at room temperature? What is the exception?

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What physical state are metals at room temperature? What is the exception?

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All metals are solid at room temperature, but the exception is Mercury, which is a liquid at room temperature.

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Groups of three elements with similar properties

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How do properties of metalloids compare to metals and non metals?

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How do properties of metalloids compare to metals and non metals?

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Has properties similar to both, its behavior is controlled by changing the conditions. Examples: computer chips and glass have metalloids in them.

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How does IUPAC organize the coloumns on the periodic table?

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How does IUPAC organize the coloumns on the periodic table?

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The columns are grouped into three broad classes based on their general properties, three classes of elements are, metals, nonmetals, and metalloids

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Chlorine, Bromine, Iodine

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Where do we find nonmetals on the periodic table?

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Where do we find nonmetals on the periodic table?

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Upper-right corner except hydrogen.

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He ordered his periodic table in increasing Atomic Mass.

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What was the problem with using triads to categorize elements?

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What was the problem with using triads to categorize elements?

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Not all of the elements could not be grouped in to triads.

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How did Mosley re-organize the periodic table

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How did Mosley re-organize the periodic table

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He used increasing atomic number to re-organize the periodic table.

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How do elements change as you move from left to right within a row on the periodic table?

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How do elements change as you move from left to right within a row on the periodic table?

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The properties of elements become less metallic and more nonmetallic

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The conditions can change the properties that the metalloids possess for example, being a conductor of electric current.

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But wait kids, how was the Table organized?

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But wait kids, how was the Table organized?

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He arranged the elements in his table by order of increasing atomic mass, my dudes.

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What was significant about the spaces on his tables?

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What was significant about the spaces on his tables?

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He left spaces cause he figured there would be other elements found later.

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What pattern did Dobereiner notice in his triads?

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What pattern did Dobereiner notice in his triads?

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One element in each triad tended to have properties with values that fell midway between those of the other two elements.

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It is the periodic repetion of physical and chemical traits when using increasing atomic number to organize the periodic table.

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How did the real OG chemist create the table though?

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How did the real OG chemist create the table though?

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He wrote down on notecards the properties of each element that organized them into groups based on repeating properties. Sounds suspiciously familiar

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How does IUPAC organize the columns on the periodic table?

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How does IUPAC organize the columns on the periodic table?

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It organizes the columns into three classes of elements and they’re metals, non-metals, and metalloids

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But what about them blanks though?? Why they s i g n i f i c a n t ?

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But what about them blanks though?? Why they s i g n i f i c a n t ?

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Because Mendeleev could predict elements that would fill them. It was pretty radical.

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How do elements change as you move from left to right within a row on the periodic table?

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How do elements change as you move from left to right within a row on the periodic table?

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The properties of elements become less metallic and more nonmetallic as you move from left to right.