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Which two elements have an atomic mass less than twice their atomic number?
Wiki User
∙ 13y ago
Hydrogen and oxygen
Wiki User
∙ 13y ago
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The atomic mass of iodine is less than the atomic mass?
The atomic mass of iodine is less than the atomic mass of all elements with greater atomic number.
What element has an atomic number lower that that of aluminum and one less valence electrons than the group 16 elements?
Nitrogen
Why those elements does not emit radiation whose atomic number is less than 82?
Because such nuclei have stable ratio of protons and neutrons, but some atoms having atomic no less than 82 are also radioactive.
This element has the lowest atomic number in group 16?
Nitrogen
What is one less proton than argon?
Chlorine, with the atomic number 17 has one less proton than argon, with the atomic number 18. The atomic number is the number of protons.
The atomic mass of iodine is less than the atomic mass?
The atomic mass of iodine is less than the atomic mass of all elements with greater atomic number.
Does Alpha decay results the lighter elements?
Yes, daughter element has atomic number two units less and atomic mass four units less.
Are the number in the periodic table are arranged by atomic mass?
No all he elements on the Periodic Table are arranged by the atomic number because some element are lighter than other and have more or less protons in the nucleus of the atom( The number of protons in an atom is the atomic number).
How are period arranged on the periodic table?
The elements are arranged in order of increasing atomic number in the Periodic Table. The rows are called periods and the columns are called groups.
How Henry Moseley rearranged the periodic table?
Henry Moseley did a series of experiments looking at the x-ray spectra of various elements. He found that the frequencies of equivalent bands made a very simple progression that more or less corresponded to atomic weight order. The exceptions were exactly the same as the ones where Mendeleev's scheme was having difficulties. He thus arrived at a definition of atomic number, and proposed a revised periodic law where the ordering of elements was according to atomic number rather than atomic weight.
What element has an atomic number lower than that of aluminum less valence electron than the the group 16 elements?
Nitrogen
What element has an atomic number lower that that of aluminum and one less valence electrons than the group 16 elements?
Nitrogen
Why those elements does not emit radiation whose atomic number is less than 82?
Because such nuclei have stable ratio of protons and neutrons, but some atoms having atomic no less than 82 are also radioactive.
This element has the lowest atomic number in group 16?
Nitrogen
7 less then twice a number?
Let the number be x Twice a number means 2x 7 less than twice a number means 2x-7
What is one less proton than argon?
Chlorine, with the atomic number 17 has one less proton than argon, with the atomic number 18. The atomic number is the number of protons.
Why aren't there many more than 100 occurring elements?
Because scientists just simply add a proton to an element, and they get the next element. For example, of you had one sodium atom (all sodium atoms have an atomic number of 11), and added a proton to it, you would get magnesium atom (all magnesium atoms have an atomic number of 12). So if scientists did this with element 99, they get element 100.
