0
The mass number of lithium is 7, which tells us the total number of protons and neutrons in the nucleus of a lithium atom. This helps determine the Atomic Mass of lithium and its position on the Periodic Table.
Add your answer:
Earn +20 pts
What is the number of neutrons plus protons in the nucleus of an atom is called?
Mass NumberProtons and neutrons are collectively called called nucleons. The number of nucleons (protons plus neutrons) in the nucleus of an atom is called the mass number. For example, Lithium has 3 protons and 4 neutrons in its nucleus. It's mass number is 7 (3+4). The mass number usually goes in front of the atomic symbol and in superscript, such as 7Li.The answer is not atomic mass or atomic weight. Although atomic mass and atomic weight are slightly different measures, they both describe averages. To determine the total number of nucleons in an atom, you need to isolate a specific isotope and add together the number of protons and neutrons.See the Related Questions below for how to find the number of protons, neutrons and electrons in any atom.
What is the oxidation number of S in Li2SO4?
The oxidation number of sulfur (S) in Li2SO4 is +6. This is because lithium (Li) has an oxidation number of +1 and oxygen (O) has an oxidation number of -2, which allows us to calculate the oxidation number of sulfur.
What does the atomic weight of an element tell us about it?
The atomic weight of an element tells us the average mass of an atom of that element compared to the mass of a hydrogen atom. It is a fundamental property of an element that helps in determining its chemical behavior and how it interacts with other elements.
The total mass of the protons and neutrons in an atom is called the?
The sum of the number of protons and neutrons in the atomic nucleus is called the "mass number".For example, Lithium has 3 protons and 4 neutrons in its nucleus. It's mass number is 7 (3+4). The mass number usually goes in front of the atomic symbol and in superscript, such as 7Li.The protons and neutrons, which are called nucleons when they are talked about as the components of an atomic nucleus, add up to make the atomic mass of an atom. Strictly speaking, the electrons are included, but they weigh next to nothing, being about 1/1836th the mass of a proton. That lets us use as the Atomic Mass the number of nucleons in the nucleus of the atom.If all of the atomic masses of atoms of a given element are averaged, the result is the element's atomic weight. These terms are often confused and thus special care must be taken when using them.
How many nuetrons are in fluorine with a mass number of 19?
Fluorine has an atomic number of 9, which means it normally has 9 protons. With a mass number of 19, the total number of protons and neutrons in fluorine is 19. Therefore, subtracting the atomic number of 9 protons gives us 10 neutrons in fluorine with a mass number of 19.
What does the mass number of an atom tell you about the atom?
The mass number tells us the number (the sum) of protons and neutrons in the nucleus of an atom.
What does the atomic mass tell us?
it tells us that the number is equal to the number of protons plus the number of nuetrons in the nucleus of an atom
What does an element's mass number tell us?
An element's mass number tells us the total number of protons and neutrons in its nucleus. It helps to determine the element's atomic mass and differentiate it from other isotopes of the same element.
What does atomic mass number tell us?
The atomic mass number tells us the total number of protons and neutrons in an atom's nucleus. It is used to determine the mass of an atom and is necessary for calculating the atomic weight of an element.
How many protons does linthium have?
An atom's atomic number tells us its number of protons. Lithium's atomic number is 3. Thus lithium has 3 protons per atom.
How much does a gallon of lithium grease weigh?
Not all types of lithium greases have the same density.For the grease EP-2 an US gallon the mass is 3,293 g.
What is the number of neutrons from a mass number of 10?
Need the atomic number - that would tell us the number of protons and from there the number of neutrons can be calculated. The question as posed does not have enough information to answer.
What does the mass number tell us about and element?
it tells you how much mass is in that object
What is the relationship between atomic number and atomic mass?
The atomic number is the number of protons in the nucleus of an atom. The number of protons in an atom's nucleus determines the chemical identity of that atom. It tells us which element it is. The elemental identity of an atom is determined by the number of protons in that atom's nucleus. This was bit repetitive, but it is a critical concept in chemistry and physics. Atomic Mass might be thought of as the "weight" of an atom. Atomic mass is found by adding up the masses of all the protons, neutrons, and electrons in the atom. As electrons weigh less than 1/1800th of what a proton weighs, they contribute only the smallest amount to the weight of the atom (compared to the protons and neutrons), regardless of which atom it is. These weights are expressed in atomic mass units because the "normal" terms for the expression of weight (mass) are far too large to be "easy to work with" on the atomic scale. Let's do a quick example with the two stable isotopes of lithium. Lithium is element number three on the Periodic Table. It has 3 protons in its nucleus, and 3 is its atomic number. (Repeating, the number of protons in the nucleus is equal to the atomic number, and this identifies the element under investigation.) Lithium has one "version" or isotope that has 3 neutrons. The atomic mass of 3Li is about 6.015 or so. Note: subtracting the atomic number from the atomic mass gives us the number of neutrons in the nucleus of that atom. The 6.015 minus the 3 yields an answer of 3 for the number of neutrons. There is also a lithium atom that has 4 neutrons in its nucleus. It's 4Li and its atomic mass is about 7.016 or so. Same math. Take the 7.016 and subtract the 3 and get 4 as the answer - and the number of neutrons in the nucleus of that atom. Those are the two stable isotopes of lithium. (There are a number of other isotopes of lithium, but they're all unstable and disappear fairly quickly after being made in the physics lab.)
What does the mass tell us about a substance?
Go find out hahaha
Lithium has only two naturally occurring isotopes The mass of lithium-6 is 6.01512 amu and the mass of lithium-7 is 7.01601 amu Use the atomic mass of lithium to calculate abundances mass Li 6.941?
To calculate the abundances of lithium isotopes, we can set up a system of equations using the atomic mass and isotope masses. Let x represent the abundance of Li-6 and y represent the abundance of Li-7. We know that x + y = 1 (total abundance) and 6.01512x + 7.01601y = 6.941 (atomic mass). Solving these equations gives x ≈ 0.08 and y ≈ 0.92, indicating that approximately 8% of lithium is Li-6 and 92% is Li-7.
How does knowing lithium's oxidation number help determine what compounds it will form?
Knowing lithium's oxidation number allows us to predict how many electrons it will lose or gain when forming compounds. Lithium typically has an oxidation number of +1, so it tends to lose one electron to achieve a stable electron configuration. This helps determine the types of compounds it will form, such as lithium oxide (Li2O) or lithium carbonate (Li2CO3).
