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6.941 is the average mass of lithium's isotopes. The majority of lithium (on average about 92.5%) is lithium-7 with 3 protons and 4 neutrons while about 7.5% is lithium-6 with 3 protons and 3 neutrons. A number of other isotopes exist but only in trace amounts.
The mass number of lithium-7 is 7 because it is the sum of the number of protons and neutrons in the nucleus of a lithium-7 atom. Lithium has 3 protons in its nucleus, and lithium-7 is the most common isotope of lithium with 4 neutrons. Therefore, 3 protons + 4 neutrons = mass number of 7 for lithium-7.
6.941 is the average mass of lithium's isotopes. The majority of lithium (on average about 92.5%) is lithium-7 with 3 protons and 4 neutrons while about 7.5% is lithium-6 with 3 protons and 3 neutrons. A number of other isotopes exist but only in trace amounts.
Lithium-7 has a mass number of 7 because it consists of 3 protons and 4 neutrons. The mass number is the total number of protons and neutrons in the nucleus of an atom.
It is just a weighted average of the amount of Lithium-6 there is and the amount of Lithium-7 there is. Since the number is much closer to 7, there is more Lithium-7 than there is Lithium-6.
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What is the mass number for lithium?
Lithium is element #3. That, of course, is the atomic number - the number of protons. The atomic mass will of course depend on the specific isotope. The most common isotope is Lithium-7, that is, atomic mass = 7. Lithium-6 also occurs in nature as a stable isotope.
How many electrons does lithium 7 have?
A neutral lithium atom has 3 electrons, the same as the number of protons, which is the atomic number of lithium. There is no lithium ion with a charge of 7+. If you mean lithium with a mass number of 7, the number of protons is 3 and the number of neutrons is 4.
What is the total number of neutrons in an atom of 7 lithium 3?
There are 4 neutrons in a lithium-7 atom. Lithium, which has atomic number 3, has 3 protons in its nucleus. If its atomic number is 3 (which is the number of protons in its nucleus) and its mass number is 7, we can find the number of neutrons by subtracting the atomic number from the mass number. In this case, 7 minus 3 equals 4.
What does the mass number tell us about lithium?
It tells us the total mass of Protons and Neutrons, in AMU, Atomic Mass Units.
if a lithium nucleus contains 3 protons and 4 neutrons. What is its atomic mass?
Lithium by default contains 3 protons and 4 neutrons so its atomic mass is 6.941 amu (atomic mass units)
What is the mass number for lithium?
Lithium is element #3. That, of course, is the atomic number - the number of protons. The atomic mass will of course depend on the specific isotope. The most common isotope is Lithium-7, that is, atomic mass = 7. Lithium-6 also occurs in nature as a stable isotope.
What is lithiums mass number?
The mass number of lithium is 7. This number represents the total number of protons and neutrons in the nucleus of a lithium atom.
What is the difference between lithium 6 and lithum 7 on the periodic table?
The main difference between lithium-6 and lithium-7 is their atomic mass. Lithium-6 has a mass number of 6, while lithium-7 has a mass number of 7. This means lithium-6 has one fewer neutron in its nucleus compared to lithium-7.
How many electrons does lithium 7 have?
A neutral lithium atom has 3 electrons, the same as the number of protons, which is the atomic number of lithium. There is no lithium ion with a charge of 7+. If you mean lithium with a mass number of 7, the number of protons is 3 and the number of neutrons is 4.
What is the mass number for lithuim?
Lithium is a metal element. Atomic mass of it is 7.
What has a mass number of seven?
Lithium is an element with an atomic number of 3 and an atomic mass of 7.
What is lithium atomic mass?
Naturally occurring lithium contains two isotopes. The common one has an atomic mass of 7. About one per cent of the lithium has an atomic mass of 6.The atomic mass of Lithium-Li is 6.941 grams.
What is the total number of neutrons in an atom of 7 lithium 3?
There are 4 neutrons in a lithium-7 atom. Lithium, which has atomic number 3, has 3 protons in its nucleus. If its atomic number is 3 (which is the number of protons in its nucleus) and its mass number is 7, we can find the number of neutrons by subtracting the atomic number from the mass number. In this case, 7 minus 3 equals 4.
Lithium mass number?
Lithium's mass number is 6.941.
What does the mass number tell us about lithium?
It tells us the total mass of Protons and Neutrons, in AMU, Atomic Mass Units.
How many neutrons are in an isotope of lithium if it has an atomic mass of ten?
An isotope of lithium with an atomic mass of ten would have an atomic number of 3, meaning it has 3 protons. To find the number of neutrons, subtract the atomic number from the atomic mass: 10 (atomic mass) - 3 (atomic number) = 7 neutrons. Therefore, an isotope of lithium with an atomic mass of ten would have 7 neutrons.
How many neutrons are in the nucleus of lithium?
Lithium Atomic number = number of proton = 3 Mass number = number of proton + neutrons = 7 Therefore number of neutrons = 7 - 3 = 4
