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Argon and calcium have atomic masses that are relatively close because they are located in adjacent periods on the Periodic Table. Argon, a noble gas in Group 18, has an Atomic Mass of about 40.0 u, while calcium, an alkaline earth metal in Group 2, has an atomic mass of approximately 40.1 u. Their similar atomic masses result from their proximity in the periodic table and the similar number of protons and neutrons in their nuclei. Additionally, variations in isotopic abundance can influence the exact values of atomic mass.
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What would cause the average atomic mass to be close to a whole number?
The average atomic mass of an element is close to a whole number when the element has nearly equal amounts of its isotopes, with atomic masses that are close to whole numbers themselves. This occurs in elements with only one stable isotope or with stable isotopes that have similar abundances.
Which isotope of argon must be most common?
40 Ar, because of its weight its very close to 40g/mol
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 element has the volume of 43 ml and the mass of 305.859?
There is no element with that atomic mass, the element that comes the closest is Ununbium with an atomic mass of 277.0.
What was Mendeleev able to find out for each element?
He was able to work out the atomic mass of the missing elements, and so predict their properties. And when they were discovered, Mendeleev turned out to be right. For example, he predicted the properties of an undiscovered element that should fit below aluminium in his table. When this element, called gallium, was discovered in 1875, its properties were found to be close to Mendeleev's predictions. Two other predicted elements were later discovered, lending further credit to Mendeleev's table.
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.
Does Argon have a bigger atomic radius then Neon?
I would say no. The potassium atom has 1 valence electron which is in the 4th valence shell. To form the potassium ion, it gives away this electron - thus becoming K+. Now, it has no electrons in the 4th valence shell - they are all in the 3rd valence shell. Argon also has all of its electrons in the 3rd valence shell. Also, K+ now has the same number of electrons as Argon. The reason why, at least I would say, argon has a larger radius than K+ is that even though they are in the same valence shell and have the same number of electrons, argon has one less proton than K+. This means that argon's nucleus does not pull in its electrons with quite as much force as K+. Therefore, the electrons (on average) are not as close to the nucleus as with K+. At least, this is how I would reason this out.
Why was Henry and the pope close in 1512?
Henry VIII and the pope was close because the pope was catherine of argon's nephew.
What would cause the average atomic mass to be close to a whole number?
The average atomic mass of an element is close to a whole number when the element has nearly equal amounts of its isotopes, with atomic masses that are close to whole numbers themselves. This occurs in elements with only one stable isotope or with stable isotopes that have similar abundances.
Why was Henry VIII and the pope close in 1512?
Henry viii and the pope was close because the pope was catherine of argon's nephew.
Which isotope of argon must be most common?
40 Ar, because of its weight its very close to 40g/mol
How can argon be dangerous?
Argon is dense and so collects close to the ground. In an enclosed space, it can fill up the lower level. It cab then cause death by asphyxiation.
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 is the electron affinity of argon?
The electron affinity of argon, like all noble gases, is 0, or very close to it, due to its chemical inertness.
How did mendeleev find the undiscovered elements of the periodic table?
Mendeleev managed to predict undiscovered elements by comparing two different elements atomic mass, that had a gap between them, and averaging there atomic mass for example: Mn _ Co if you dont know what the middle element is then by looking at the the atomic mass of Mn and Co you can work out roughly what its atomic mass is. Mn=55 and Co=59 so by adding them together and dividing by 2 you get 57 however Fe is in fact 56 but as you can see it was very close and this was how he would work out the atomic mass. He would also compare the properties of elements with similar atomic mass for example the alkaline metals such as lithium and sodium will react in the same way by doing this he could work out what a missing element would look, feel, react like etc.
What element has the volume of 43 ml and the mass of 305.859?
There is no element with that atomic mass, the element that comes the closest is Ununbium with an atomic mass of 277.0.
What are some danger with argon?
Argon is dense and so collects close to the ground. In an enclosed space, it can fill up the lower level. It cab then cause death by asphyxiation. Because it is colourless and odourless it is hard to detect.
