Table of Contents
- 1 How is the number of electrons in each shell calculated what is the formula?
- 2 What is the name of the scientist that proposed the theory of electron shells?
- 3 What determines the position of an element in the periodic table?
- 4 Which of the following determines the type of element that an atom makes?
- 5 How do you find the number of electrons possible per shell?
- 6 What is the total number of K-shells required for 2 electrons?
How is the number of electrons in each shell calculated what is the formula?
Rule 1: The maximum number of electrons present in a particular shell is calculated by the formula 2n2, where “n” represents the shell number. For instance, K shell is the first shell and it can hold up to 2(1)2 = 2 electrons. Similarly, L shell is the second shell and it can hold up to 2(2)2 = 8 electrons.
What is the name of the scientist that proposed the theory of electron shells?
In 1913 Bohr proposed his quantized shell model of the atom (see Bohr atomic model) to explain how electrons can have stable orbits around the nucleus.
How do scientists determine the number of neutrons in an isotope of an atom?
To find the number of neutrons in an isotope, subtract the number of protons from the atomic mass of the isotope. The atomic number of the element equals the number of protons.
Who discovered the electron write the characteristics of an electron?
physicist J.J. Thomson
During the 1880s and ’90s scientists searched cathode rays for the carrier of the electrical properties in matter. Their work culminated in the discovery by English physicist J.J. Thomson of the electron in 1897.
What determines the position of an element in the periodic table?
An element’s location in the periodic table is largely dependent on its electrons; the number of valence shell electrons determines its group, and the type of orbital in which the valence electrons lie in determines the element’s block.
Which of the following determines the type of element that an atom makes?
An element and its location in the periodic table is determined according to the number of protons in the nucleus. The electrons influence the atom’s electric charge. The number of neutrons influences the element’s mass; that is how isotopes of the same element differ.
How do scientists determine the number of protons in an atom?
Spectroscopy gives you the answer. The frequency of X-rays emitted was found to be proportional to the square root of the atomic number of the element. This is the number of protons. In a neutral atom, number of electron=number of protons.
How many orbitals are there in 2n2?
IN SHORT – we can say that “As the total number of ORBITALS present in a shell is n² , and every orbital contains two electrons each. So, the formula is two times the number of orbitals = 2n² ”. FOR LONG ANSWER, CONTINUE READING….
How do you find the number of electrons possible per shell?
Thus, to find the number of electrons possible per shell. The first shell has 1 subshell, which has 1 orbital with 2 electrons total. For the second shell, , so the allowed values of are: , which is the subshell, and , which is the subshell. For , has three possible values: . Thus the subshell has three orbitals.
What is the total number of K-shells required for 2 electrons?
The maximum number of electrons accommodated in the K shell (1 st orbit) will be 2. The second orbit will accommodate rest of the electrons left (6 electrons). Electronic configuration of Oxygen = 2, 6. Therefore, the total number of shells required = 2 (1st and 2 nd shell/orbit).
How many electrons can the n=1 shell of an orbital hold?
An s-orbital holds 2 electrons. Thus n=1 shell can hold two electrons. The n=2 (second)shell has: The 2s orbital