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What would cause the average atomic mass to be close to a whole number?
Wiki User
∙ 9y ago
The average Atomic Mass of an element would be closer to a whole number if there were few to no electrons. This means having little to no electrons in the element's isotopes.
Wiki User
∙ 9y ago
Wiki User
∙ 13y agoThe mass number.
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The number shown on the top part of each of the element squares in a periodic table is the?
This depends on the periodic table but it is either the atomic number (the number of protons) or the atomic mass (the number of protons and neutrons). The integer number will be the atomic number and the larger number will be the atomic mass. The exception is hydrogen which has an atomic number of 1 and an atomic mass of 1 (very close to it).
Is an atom with an atomic number of 1 stable?
The atom with an atomic number of 1 is Hydrogen. Hydrogen only has one electron and is very unstable because it is very close to the nucleus and has an incomplete valence shell holla back
Is the atomic number protons or neutrons?
Atomic number is determined by the number of protons, Atomic Mass is Protons + neutrons (electrons weigh less then 1/1800th of a proton which is so close to nothing that they are usually ignored at most levels) Neutrons and protons each have an atomic weight of 1, if you want to split hairs neutrons are a shade heavier then protons but again at most levels this is insignificant.
What determines the atomic mass of an element?
The atomic weight of an atom depends on the number of protons and neutrons in one atom of the element, and is usually the average mass of all the known natural isotopes of the element. The atomic weight refers to the force of gravity on one atom of the element.After the IUPAC rules the atomic mass is a term used only for the mass of isotopes; and the atomic weight is the term used for an element.The atomic weight of an atom is determined by the mass of its constituent particles, the protons, electrons, and neutrons. In practice, however, the electrons are so much smaller than the protons and neutrons, and the neutrons are close enough to the mass of the protons, that it is common to say that the atomic weight is the number of protons plus the number of neutrons. This is not exact, however, and the periodic table reflects this.
Are two atoms of different elements because they have close but different masses?
An element is made up of only one type of atom. Atoms are only different from each other due to their atomic number - which is the number of protons. Different elements may have different relative atomic masses, but it is the differing number of protons in each atom that determines which element it is.
What would cause the average atomic mass of an element to be close to a whole number?
It would be because if you are averaging a number there is a chance that it could be a whole number or not. Jake Caterinea
Which atomic mass number is closest to the average atomic mass of chlorine?
The periodic table is listed by atomic number which is highly related to atomic mass. Therefore the close ones would be to the left (Sulfur) and right(Argon). Sulfur is closest with an average distance of about 3.5 AMU.
What is the general relationship between atomic number and atomic mass weight?
As atomic number rises so does the atomic mass. There is no close relationship. Atomic number is the number of protons in the nucleus. Average atomic mass takes the mass of naturally occurrring isotopes which include the mass of the varying numbers of neutrons present which account for a large proportion of the overall mass of an atom.
What is the formula for finding the amount of neutrons in an element?
The number of neutrons equals the atomic mass (MA) minus the atomic number (XA). (#neutrons=MA-XA). The neutrons can be calculated in this manner because neutrons hold significant mass in the atom. The molar mass featured for a particular element in periodic tables is actually the average of the atomic masses of the elements' numerous isotopes (elements with extra neutrons than normal). So, by subtracting this mass by the atomic number (the number of protons), you will get a value that is very close to actual number of neutrons for that average element.
The number shown on the top part of each of the element squares in a periodic table is the?
This depends on the periodic table but it is either the atomic number (the number of protons) or the atomic mass (the number of protons and neutrons). The integer number will be the atomic number and the larger number will be the atomic mass. The exception is hydrogen which has an atomic number of 1 and an atomic mass of 1 (very close to it).
Do all isotopes have whole number atomic masses?
The short answer is yes. The long answer is that isotopes have different numbers of neutrons than other isotopes of the same element, so when expressing the mass of an isotope, you don't take an average; you just add the number of neutrons and the number of protons. However, that number is not entirely accurate since the mass of a proton and a neutron are very slightly different. So, if you want to be very exact, then no, the mass of an isotope is not a whole number, but it is very, very close.
In the periodic table which element has a mass number of 108?
hassium a radioactive element has 108 atomic number
Does an element's mass number tells the number of protons in its nucleus?
Close; Mass # is the number of protons + the number of neutrons.
What do you get if you add one neutron to a hydrogen nucleus?
If you add the number of protons and neutrons in an atomic nucleus, you get the number of nucleons. This is usually a good approximation to the atomic mass in amu, since both protons and neutrons have a mass that's pretty close to one amu. The number will be slightly off, because electrons contribute as well, protons and neutrons don't have exactly the same mass, and there's something called the atomic mass defect that has to do with the binding energy of the nucleus, but it should be fairly close.
What is Carbon-12 atomic mass?
12. The number 12 refers to the atomic mass. More precisely, to the sum of neutrons + protons; but this is usually close to the atomic mass. In the case of carbon-12, it is exact, by definition.
What are diifferent between mass number and atomic number?
The atomic number represents the number of protons in the nucleus. It determines what element you're talking about. Numbered from 1 to over 100. The mass number represents the total of protons AND neutrons in the nucleus. It is close to (not the same as) the atomic mass. Isotopes can have different mass numbers but belong to the same element (same atomic number). The number of neutrons (not having a special 'name') varies from 0 to over 150.
What is the density of lead with 2 percent antimony?
121.760
