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Sometimes the Atomic Mass is listed as the average mass of the isotopes and contains a decimal. But since you can't have a fractional part of a proton or a neutron without creating a big mess, it is necessary to round to the nearest whole number. Subtracting the atomic number from the rounded atomic mass will give you the number of neutrons.
Wiki User
∙ 8y ago
Wiki User
∙ 15y agoThe atomic mass of a neutron is one, therefore it is not rounded up or down.
Wiki User
∙ 9y agoThis is because what you are looking for is a count of neutrons and a count must be a whole number.
Pierre Rivet
pfffff havent got a scooby doo
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What elements have such small masses that they are not even considered when atomic masses are calculated?
Electrons
Which statement best explains why most atomic masses on the periodric table are decimal numbers?
Most atomic masses on the periodic table are decimal numbers because they are weighted averages of the masses of all isotopes of an element, taking into account their relative abundance. Since isotopes have different masses, the atomic mass is typically not a whole number.
What nuclide is used as the standard in the relative scale for atomic masses and What is it's assigned atomic mass?
Carbon-12 (12C) is used as the standard in the relative scale for atomic masses, and its assigned atomic mass is 12 atomic mass units.
Name the elements whose atomic masses corrected by mendeleev?
The atomic masses corrected by Mendeleev are those of beryllium, indium, and uranium. Mendeleev was able to accurately predict the properties of these elements based on their corrected atomic masses.
Is atomic number rounded?
No.
How do atomic numbers and atomic masses increase in the periodic table?
Atomic numbers increase from left to right across a period on the periodic table. This is because each element in a period has one more proton in its nucleus compared to the element before it. Atomic masses generally increase from left to right as well, but there may be deviations due to isotopes or other factors. Within a group or column, atomic numbers and atomic masses increase from top to bottom as each successive element has more electrons and neutrons than the one above it.
By adding the atomic masses?
You will get the atomic bomb!
How were the atomic number and the atomic masses of the elements determined?
Atomic masses are determined by mass spectrometry. The atomic number is identic with the number of protons in the atom - depends on position in the periodic table.
What is the atomic number krypton rounded?
The atomic number of krypton is 36.
The average atomic mass of an element is the average of the atomic masses of its?
The average atomic mass of an element is the average of the atomic masses of its isotopes (that is a weighted average). You have to take into account the abundance of each isotope when they do your averaging.
What elements have such small masses that they are not even considered when atomic masses are calculated?
Electrons
What atoms with same atomic number but different atomic masses?
Isotopes are atoms with the same number of protons (same atomic number) but different numbers of neutrons, leading to different atomic masses. For example, carbon-12 and carbon-14 are isotopes of carbon with atomic number 6 but atomic masses of 12 and 14 respectively.
How are the atomic numbers and the atomic masses of the elements related to how the elements are arranged on peridoic table?
The atomic number of an element is the number of protons in its nucleus, while the atomic mass is the average mass of the isotopes of that element. Elements on the periodic table are arranged in order of increasing atomic number, which also corresponds to the number of electrons in a neutral atom of that element. The periodic table is structured based on these increasing atomic numbers, with elements organized into groups and periods based on similarities in their properties.
Which Russian scientist related chemical properties and atomic masses?
Dmitri mendeleev related the chemical properties and atomic masses around 1860
What did Dimitri Mendeleeve do?
Dmitri arranged the elements in order of increasing atomic masses. He arranged elements in rows and columns according to atomic masses.
State the name and the mass of the isotope relative to which all atomic masses are measured?
The isotope used as the reference for atomic masses is carbon-12, with a mass of 12 atomic mass units (amu).
Atoms having the same atomic number but different atomic masses?
Isotopes
