The amount of neutrons can change among elements atoms of the same type element. These are called isotopes. Lithium actually has an atomic number of 3. An atomic number means how many protons it has. The problem most likely means that it has an Atomic Mass of 7. If that is true, it becomes easy. Atomic mass means the total weight of the element. A proton and a neutron each weigh '1.' All you have to do is look and see that lithium has an atomic number of '3' which means that it has 3 protons. You subtract that from the mass to get an answer of 4. This means that lithium in this example has 4 neutrons.
Electrons aren't counted in the mass of the element because they weigh so little. That is the same reason why a neutron (which is technically a proton and an electron together) has the same weight as a regular proton.
The atomic number of lithium is 3. Therefor there are 3 protons and neutron in the nucleus of lithium. Lithium also has 4 neutrons. atomic # = protons and neutrons neutrons = rounded atomic mass - atomic number Sources- 7th grade Acc. Science
Lithium has 3 protons thus even if it has 4 neutrons it is still atomic number of 3
Lithium by default contains 3 protons and 4 neutrons so its atomic mass is 6.941 amu (atomic mass units)
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.
It tells us the total mass of Protons and Neutrons, in AMU, Atomic Mass Units.
The atomic number of lithium is 3. Therefor there are 3 protons and neutron in the nucleus of lithium. Lithium also has 4 neutrons. atomic # = protons and neutrons neutrons = rounded atomic mass - atomic number Sources- 7th grade Acc. Science
Lithium Atomic number = number of proton = 3 Mass number = number of proton + neutrons = 7 Therefore number of neutrons = 7 - 3 = 4
Lithium has 3 protons thus even if it has 4 neutrons it is still atomic number of 3
Lithium typically has 3 or 4 neutrons because lithium has an atomic number of 3, meaning it has 3 protons in its nucleus. Neutrons help stabilize the nucleus of an atom, and having 3 or 4 neutrons allows lithium to have a stable configuration.
Atomic number is the number of protons in the nucleus of an atom while the mass number is the sum of the protons and neutrons in the nucleus of an atom. for example lithium has an atomic number of 3 and a mass number of 7. Therefore lithium has 3 protons and 4 neutrons.
Lithium has 3 protons. The atomic number and the number of protons will be the same.
Lithium by default contains 3 protons and 4 neutrons so its atomic mass is 6.941 amu (atomic mass units)
No. Atomic number refers to the number of protons present in the nucleus of the atom whereas mass number refers to the sum of the number of protons and neutrons in the nucleus. For example, the isotope lithium-6 has an atomic number of 3 (for 3 protons) and a mass number of 6 (for 3 protons and 3 neutrons).
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.
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.
You need to find the atomic number, and the atomic mass. The atomic number i the number of PROTONS in the nucleus, the atomic mass, or mass number, is the number of PROTONS and NEUTRONS in the nucleus. To find the number of neutrons you subtract the atomic number from the mass number.
The mass number is the total number of protons plus neutrons in the nucleus. The atomic number is the total number of protons in the nucleus. So subtract the atomic number from the mass number and that will give you the total number of neutrons in the nucleus.