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Isobars are not part of the Periodic Table. Isobars connect areas of equal pressure on a weather map.

However the term "isobar" (meaning "equal weight") is also used to describe isotopes whose atomic nuclei have similar weight.

Isobars are isotopes of two different elements with the same molar mass, or, rather, the same mass numbers. The reason they are placed differently in the periodic table is that chemical properties are determined by the number of protons in the nucleus, and the number of electrons in the outer part of the atom, while mass numbers are determined by the number of (protons plus neutrons).

Neutrons play almost no part in chemical reactions; a heavier isotope of any element will undergo exactly the same reactions as a lighter isotope, but just very slightly more sluggishly.

One striking example of isobars is Argon-40 (18 protons and 22 neutrons) and Calcium-40 (20 protons and 20 neutrons). Both are the most abundant isotopes of these respective elements, comprising well over 90% of each element as found on the Earth. But argon-40 is a noble gas, roughly 1% of the atmosphere, that refuses to enter into chemical reaction with anything, except under the most extreme conditions. Calcium-40, on the other hand, is a rather brittle and reactive metal that tarnishes rapidly in air, and bubbles away steadily as it reacts with water, producing hydrogen gas in the process. These isobars thoroughly deserve their separate placement in the periodic table.

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12y ago
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AnswerBot

6mo ago

Isobars are atoms with the same mass number but different atomic numbers. They are placed in different locations on the Periodic Table because they have different numbers of protons and therefore different chemical properties. Isobars typically form different elements due to the difference in atomic number.

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Anonymous

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4y ago

Isobars are placed at different places in periodic table because they have different atomic number , but Atomic Mass and the modern periodic table is based on the atomic number of the element .

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Q: Why isobars are placed at different places in periodic table?
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Who Discovered Isobars In Chemistry and Isobar Definition?

The concept of isobars in chemistry was discovered by J.J. Thomson in 1913. Isobars refer to atoms of different elements that have the same mass number but different atomic numbers, resulting in different elements with similar mass.


Where are the lanthanides and actinides places in the periodic table?

they are not placed from elements 57-70.


Isobars are lines ona map joining places that have the same?

Isobars are lines on a map joining places that have the same atmospheric pressure.


What are lines on a weather map joining places that have the same air pressure?

Those lines are "isobars."


What are lines on a maps that join places that have the same airpressure?

isobars


Do isobars join places that have the same air pressure?

Yes.


How is the order different to the first attempt in the periodic table?

The order of elements in the periodic table is based on their atomic number. The first attempt, by Dmitri Mendeleev, was based on arranging elements by increasing atomic mass. This created inconsistencies in the arrangement that were later corrected when the modern periodic table was developed.


What are rthe lines which adjoin different places with same pressure?

Lines that connect different locations with the same air pressure are called isobars. Isobars are commonly found on weather maps and help meteorologists visualize patterns in air pressure across regions.


What are line joining places on the weather map that have the same air temperature called?

The logifisicalup line.


What are isobars in weather?

Isobars on a map represent areas on the map of similar atmospheric pressure.


Why are electrons placed in different places?

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Do places having equal pressure connected by isotherms on a weather map?

No, places having equal pressure are connected by isobars on a weather map. Isotherms connect places with equal temperature.