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It is an atom. The only atom with 81 protons, i.e. atomic number 81, is Thallium, Tl. If it has 3 less electrons it has 3+ positive charge. So it is the Tl3+ ion. Note you usually encounter Thallium as Tl+ . In thsi respect it is different from the other members of Group 13.

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How many protons neutrons and electrons in thallium?

ThalliumSymbol: TlAtomic Number: 81Atomic Mass: 204.3833 amuNumber of Protons & Electrons: 81Number of Neutrons: 123


How many protons electrons and neutrons in lanthanum-138?

Lanthanum has 57 protons and 81-82 neutrons.


What is the mass of a neutral atom with 31 electrons and 38 neutrons?

The mass of a neutral atom is the sum of the protons and neutrons. If an atom has 31 electrons, it must also have 31 protons to maintain neutrality. Adding the 31 protons and 38 neutrons gives a total mass of 69 atomic mass units (amu).


How many electrons protons and neutrons are there in an atom of bromine 81?

An atom of bromine-81 has 35 protons, 35 electrons, and 46 neutrons. This is because the atomic number of bromine is 35, which corresponds to the number of protons and electrons, and the atomic mass of bromine-81 is 81, which is the sum of protons and neutrons.


What is 81 minus 78?

81 - 78 = 3


What is the percent 78 of 81?

78/81 = 0.963 = 96.3%


What can 81 and 78 go into?

81 and 78 go into 2106.


How many protons in thalium?

81 protons, as the atomic number of thallium is 81


How many protons and neutrons and electrons does Barium have?

Barium has an atomic number of 56, which means that it has 56 protons. Thus, to have a neutral charge, it must carry 56 electrons as well. The atomic mass of Barium is 137.33, which means that the most common isotope of Barium should weight 137 atomic mass units. Subtract the weight of the protons (electrons being so small as to not matter in the overall weight), and you have the weight of the neutrons, 81 amus. Given that one neutron equals one amu, there are 81 neutrons in the most common isotope of Barium.56 protons56 electrons81 neutronsBarium has an atomic number of 56 and therefore has 56 each of protons and electrons. The number of neutrons is the mass number minus the atomic number:137 - 56 = 81 neutrons.Neutrons 81 or 82electrons 56protons 56


How many electrons and protons does Br have?

Br has an atomic number of 35 giving it 35 protons. Since it has a charge of 1- it will have 36 electrons to form a octet.Br- will have 35 protons and 36 electrons. The negative charge indicates it gained an electron.


What is 81 plus (a-3)?

78


How many protons does thallium-201 have?

Thallium-201 has 81 protons. This is because the number of protons in an atom is equal to its atomic number, and thallium has an atomic number of 81.

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