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Why does the mass number change from 211 to 207 after a decay?
Wiki User
∙ 11y ago
because it releases energy, neutrons and neutrinos.
Wiki User
∙ 11y ago
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Element with 207 as it atomic mass number?
Lead
What element has 82 protons and 126 neutrons?
Mass number is found by adding the number of protons plus the number of neutrons. Electrons are not added because they are so minute that their masses have almost no bearing on the total mass of the atom. In this case, the mass number would be about 214.
What element that has an atomic mass of 207?
Lead
How many electrons are in lead outer shell?
82. Lead is an element with symbol Pb and atomic number 82. The atomic number relates to the amount of electrons of the element
What is the total number of neutrons in an atom of 82Pb-207?
Neutrons = 207 - 82 = 125
Why does mass number change from 211 to 207 after a decay?
because it releases energy, neutrons and neutrinos.
What is the mass number of this element Pb 82 207.19?
Lead is a metal element. Atomic Mass number of it is 207.
What is the mass number lead?
Lead is a metal element. Atomic mass of it is 207.
Element with 207 as it atomic mass number?
Lead
What is the number of atomic mass in lead?
Lead is a meta element. Atomic mass of it is 207.
How many proton's neutrons and electrons of Pb are present with a mass number of 207 and an atomic number of 82?
atomic mass equal to number of protons and neutrons. If Pb has a mass of 207 and an atomic number of 82, that means that there are 82 protons in Pb, which also means there should be 82 electrons. That leaves neutrons, which would be 207-82=125 neutrons.
What is leads mass number?
Stable isotopes are 204, 206, 207, and 208. Average is 207.2.
What element has 82 protons and 126 neutrons?
Mass number is found by adding the number of protons plus the number of neutrons. Electrons are not added because they are so minute that their masses have almost no bearing on the total mass of the atom. In this case, the mass number would be about 214.
How many neutrons are in the average atom having an atomic mass of 207.2 grams per mole?
Look on the periodic table for the element with the closest atomic mass to that number. It's lead (Pb, #82.) Now, for the neutron count, you round that atomic mass to the nearest whole number, which is 207, then subtract the atomic number of 82 from it. 207-82=125. So 125 neutrons.
Is 207 a prime number or a composite number?
207 is a composite number. Its factors are: 1, 3, 9, 23, 69, and 207
What element has an atomic mass of 207?
Lead
What element that has an atomic mass of 207?
Lead
