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Aleks04 [339]
3 years ago
6

Look up the word periodic in the dictionary propose a reason for the naming of the periodic table

Chemistry
1 answer:
kompoz [17]3 years ago
3 0

Meaning of Periodic in dictionary was found to be "<em>appearing or occurring at intervals</em>".

Purpose of Reason for naming the Periodic Table:

The elements is periodic table have been found of having same iso-electronic properties and the major periodicities found are of two, eight and eighteen respectively.

Examples:

                First Group elements tends to loose only one electron to form M⁺ cation. Starting from Lithium with atomic number 3, secondly sodium which has atomic number 11. When 3 (lithium) is subtracted from 11 (sodium) (i.e. 11-3=8) eight is attained. Same when 11 (sodium) is subtracted from 19 (Potassium), again 8 is obtained. Going downwards the group the number of 18 is obtained i.e. Rubidium (37-19=18), Cesium (55-37=18).

                Seventh Group elements tends to gain only one electron to form X⁻ anion. Starting from Fluorine with atomic number 9, secondly Chlorine which has atomic number 17. When 9 (Fluorine) is subtracted from 17 (Chlorine) (i.e. 17-9=8) eight is attained. Same when 17 (Chlorine) is subtracted from 35 (Bromine), 18 is obtained. Going downwards the group the number of 18 is obtained i.e. Iodine (53-35=18).

<h3>Conclusion:</h3>

                  Hence, we can conclude that Periodic Table is designed in such a way that after a particular interval the chemical and physical properties of elements repeats. Therefore, it can help in understanding the nature of elements without going into experimental experiments.

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7 0
2 years ago
How many neutrons are in a Cs-130 isotope?
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3 years ago
If you can answer as many of these as possible that would be great, will give thanks, 5 stars, and brainliest :)
alexandr1967 [171]

Answer:

  1. The nucleus of the atom as suggested by "nuclear" chemistry.
  2. Radioactive element are generally very large due to both their high number of protons, neutrons, and electrons.
  3. An excessive amount of protons or neutrons.
  4. Periodic table, table O, and table N.
  5. Personal opinion question.
  6. The atomic number.
  7. It represents the number of protons, and can also represent the number of electrons in a neutral atom (an atom with no charge).
  8. Protons ---- element.
  9. Random, self-generated.
  10. Gamma radiation is the only thing on table O that is mass less. Close to being the same is Beta particles which have almost no mass.
  11. Neutrons and Gamma radiation.
  12. Gamma radiation.
  13. Electrons and Beta particles.
  14. To turn one element into the isotope of another. Yes, I believe it is aptly named because you are changing the identity of the element.
  15. The number of protons because they are what define the identity of an element.

Goodluck!

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