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How do the radii of metals in each period compare with the radii of nonmetals in that period?
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Do alkali metals have a big radii?
Yes. For the elements in a given period, alkali metals have the largest radii.
In the same period what have large atomic radii alkali metals or noble gases?
Noble gases have larger atomic radii than alkali metals in the same period.
What are the general and characteristics of metals and non metals and metalloids?
Metals: Shiny 'metallic' appearance Solids at room temperature (except mercury) High melting points High densities Large atomic radii Non Metals: High ionization energies High electronegativities Poor thermal conductors Poor electrical conductors Brittle solids Little or no metallic luster Gain electrons easily Metalloids: Electronegativities between those of metals and nonmetals Ionization energies between those of metals and nonmetals Possess some characteristics of metals/some of nonmetals Reactivity depends on properties of other elements in reaction Often make good semiconductors
Why do alkali metals have a low density?
A. Alkali metals have the large radii and low atomic weights
Why are the radii changing as you move down the table within a column?
Radii generally decrease from left to right along each period (row) of the table, from the alkali metals to the noble gases; radii increase down each group (column). The radius increases sharply between the noble gas at the end of each period and the alkali metal at the beginning of the next period
Do alkali metals have a big radii?
Yes. For the elements in a given period, alkali metals have the largest radii.
In the same period what have large atomic radii alkali metals or noble gases?
Noble gases have larger atomic radii than alkali metals in the same period.
What are the general and characteristics of metals and non metals and metalloids?
Metals: Shiny 'metallic' appearance Solids at room temperature (except mercury) High melting points High densities Large atomic radii Non Metals: High ionization energies High electronegativities Poor thermal conductors Poor electrical conductors Brittle solids Little or no metallic luster Gain electrons easily Metalloids: Electronegativities between those of metals and nonmetals Ionization energies between those of metals and nonmetals Possess some characteristics of metals/some of nonmetals Reactivity depends on properties of other elements in reaction Often make good semiconductors
Why do alkali metals have a low density?
A. Alkali metals have the large radii and low atomic weights
How do the lengths of two radii of the same circle compare?
The sum of two radii of a circle is the same as the diameter of the circle.
Why are the radii changing as you move down the table within a column?
Radii generally decrease from left to right along each period (row) of the table, from the alkali metals to the noble gases; radii increase down each group (column). The radius increases sharply between the noble gas at the end of each period and the alkali metal at the beginning of the next period
What group of elements have members of the smallest atomic radii for a given period?
Noble gases have the smallest atomic radius.
WHAT ARE THE CHARACTERISTIC OF METALS AND NONMETAL?
Some characteristics Of Metals, Nonmetals, And Metalloids: Metals: High thermal and electrical conductivity Hard, dense, and solid (except For Mercury [which is a liquid]) Strong Malleable Ductility Luster Sonorous High melting points High tensile strength Nonmetals: Do not conduct heat and electricity very well Dull Brittle Not sonorous Insulators Low melting point Low tensile strength Metalloids: Semi-conductors Low conductivity
What is the change in atomic radii for the elements in period 2?
Seventeen
Which elements has the largest atomic radii in periodic table?
The atomic radii of members of the Group 1A (Alkali metals), increases down the group. Therefore Francium has the largest atomic radius of the Alkali metals. However Fr has no stable isotopes, thus is not naturally occurring. So Cs-133 is the largest you can find.
As you go from left to right across a period the atomic radii does what?
Increases
How does bromine's atomic radius compare to chlorine's?
Bromine's atomic radii is larger than that of chlorine.
