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Why does iodine have alower average atomic mass that tellurium?
Wiki User
∙ 11y ago
It has a lower atomic number because it has less protons in the nucleus, it has a lower mass number because it has less neutrons and protons in the nucleus. Electrons aren't considered in any of these numbers because they only weigh about 1/2000 of a proton - they are almost weightless, even compared to an atom.
Wiki User
∙ 11y ago
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What element has 127 atomic mass?
Iodine is a non meta element. Atomic mass of it is 127.6.
How tellurium and iodine show the periodic table is not arranged on basic of increasing atomic mass?
They show that the periodic table isn't arranged on the basis of increasing atomic mass because iodine has a mass lesser than tellurium. Iodine has a mass of 126.90 and tellurium has a mass of 127.60.
What ordered pairs of elements shows an increase in atomic number but a decrease in average atomic mass?
this happens with argon and potassium, and also with cobalt nickel. fun stuff.
What two element are out of order in periodic table?
It might be Iodine and Tellurium because Tellurium has a larger atomic weight than Iodine but Iodine has more similar properties with Fluorine and Chlorine so Mendeleev placed them that way to make more sense but at that point the elements were aranged in order of atomic mass. Now the periodic table is in order of it's atomic number rather than it's atomic mass so it all fits nicely.
How can iodine z equals 53 have a higher atomic number yet lower atomic mass than tellurium z equals 52?
Because the naturally occurring isotopes of tellurium have fewer neutrons than the naturally occurring isotopes of iodine.
What element has 127 atomic mass?
Iodine is a non meta element. Atomic mass of it is 127.6.
How is it that tellurium has a greater mass number than iodine if an iodine atom has one more proton than a tellurium atom?
Iodine nuclei have one more Proton than Tellurium, but in general the Tellurium atoms have more neutrons, giving a higher average atomic mass. Elements often have isotopes, and their stated atomic masses are averages which look at the abundance of these isotopes. In a given sample of Iodine, 100% of it will be 127I, though the tiniest trace of 129I will exist. In a sample of Tellurium, 65% will be 128Te and 130Te. This makes Tellurium's average atomic mass a little higher than Iodine's.
How tellurium and iodine show the periodic table is not arranged on basic of increasing atomic mass?
They show that the periodic table isn't arranged on the basis of increasing atomic mass because iodine has a mass lesser than tellurium. Iodine has a mass of 126.90 and tellurium has a mass of 127.60.
What neighboring elements have atomic masses out of order?
Tellurium and Iodine
What ordered pairs of elements shows an increase in atomic number but a decrease in average atomic mass?
this happens with argon and potassium, and also with cobalt nickel. fun stuff.
Why did mendeleev place tellurium before iodine?
Iodine's atomic number is 53 whereas tellurium's is 52. Atomic number is basically the number of protons that an element has. Therefore, as iodine has more protons than tellurium, it appears later in the table.
Why did Mendeleev swap Tellurium and Iodine around?
Iodine has a lower relative atomic mass than tellurium, meaning it should come before tellurium following Mendeleev's rule. However, in order to place iodine with the elements that consisted of similar properties, he had to put it after tellurium. Thus breaking his own rule.-Hope this helped :)
What two element are out of order in periodic table?
It might be Iodine and Tellurium because Tellurium has a larger atomic weight than Iodine but Iodine has more similar properties with Fluorine and Chlorine so Mendeleev placed them that way to make more sense but at that point the elements were aranged in order of atomic mass. Now the periodic table is in order of it's atomic number rather than it's atomic mass so it all fits nicely.
How can iodine z equals 53 have a higher atomic number yet lower atomic mass than tellurium z equals 52?
Because the naturally occurring isotopes of tellurium have fewer neutrons than the naturally occurring isotopes of iodine.
What happened to the atomic mass of the elements moving from left to right within a period?
The Atomic Mass usually increases, but there are a few exceptions, such as tellurium to iodine.
What happens to the atomic mass of the element moving from left to right within a period?
The Atomic Mass usually increases, but there are a few exceptions, such as tellurium to iodine.
Which two elements on a periodic table be reversed if you used atomic mass?
Tellurium (Te) and iodine (I) would be in reverse order if the elements were placed in order of atomic mass instead of atomic number.
