(a)
Interpretation: For the given
Concept Introduction:
- Pauli Exclusion Principle: No two electrons having the same spin can occupy the same orbital. To occupy the same orbital, two electrons must have opposite spins.
- Hund’s rule: When electrons occupy orbital, one electron enters each orbital until all the orbitals contain one electron. When the orbitals are singly filled, all the electrons have same spin where as in the doubly filled orbitals, electrons have opposite spin.
- Aufbau’s Principle: The electrons in an atom fill the lowest energy levels in order of increasing energy. The order in which the electrons should be filled is 1s,2s,3s,3p,4s,3d,4p,5s,4d,5p,6s,4f,5d,6p,7s,5f,6d.
- The maximum number of electrons that can be placed in a subshell is given by 2(2l+1). This gives 2,6,10 and 14 electrons for the sub shells of s, p, d, f respectively.
To write the ground-state electronic configuration of element with atomic number 10
(b)
Interpretation: For the given atomic number, the ground-state electronic configuration has to be written.
Concept Introduction:
- Pauli Exclusion Principle: No two electrons having the same spin can occupy the same orbital. To occupy the same orbital, two electrons must have opposite spins.
- Hund’s rule: When electrons occupy orbital, one electron enters each orbital until all the orbitals contain one electron. When the orbitals are singly filled, all the electrons have same spin where as in the doubly filled orbitals, electrons have opposite spin.
- Aufbau’s Principle: The electrons in an atom fill the lowest energy levels in order of increasing energy. The order in which the electrons should be filled is 1s,2s,3s,3p,4s,3d,4p,5s,4d,5p,6s,4f,5d,6p,7s,5f,6d
- The maximum number of electrons that can be placed in a subshell is given by 2(2l+1). This gives 2,6,10 and 14 electrons for the sub shells of s, p, d, f respectively.
To write the ground-state electronic configuration of element with atomic number 22
(c)
Interpretation: For the given atomic number, the ground-state electronic configuration has to be written.
Concept Introduction:
- Pauli Exclusion Principle: No two electrons having the same spin can occupy the same orbital. To occupy the same orbital, two electrons must have opposite spins.
- Hund’s rule: When electrons occupy orbital, one electron enters each orbital until all the orbitals contain one electron. When the orbitals are singly filled, all the electrons have same spin where as in the doubly filled orbitals, electrons have opposite spin.
- Aufbau’s Principle: The electrons in an atom fill the lowest energy levels in order of increasing energy. The order in which the electrons should be filled is 1s,2s,3s,3p,4s,3d,4p,5s,4d,5p,6s,4f,5d,6p,7s,5f,6d
- The maximum number of electrons that can be placed in a subshell is given by 2(2l+1). This gives 2,6,10 and 14 electrons for the sub shells of s, p, d, f respectively.
To write the electronic configuration of element with atomic number 28
(d)
Interpretation: For the given atomic number, the ground-state electronic configuration has to be written.
Concept Introduction:
- Pauli Exclusion Principle: No two electrons having the same spin can occupy the same orbital. To occupy the same orbital, two electrons must have opposite spins.
- Hund’s rule: When electrons occupy orbital, one electron enters each orbital until all the orbitals contain one electron. When the orbitals are singly filled, all the electrons have same spin where as in the doubly filled orbitals, electrons have opposite spin.
- Aufbau’s Principle: The electrons in an atom fill the lowest energy levels in order of increasing energy. The order in which the electrons should be filled is 1s,2s,3s,3p,4s,3d,4p,5s,4d,5p,6s,4f,5d,6p,7s,5f,6d
- The maximum number of electrons that can be placed in a subshell is given by 2(2l+1). This gives 2,6,10 and 14 electrons for the sub shells of s, p, d, f respectively.
To write the ground-state electronic configuration of element with atomic number 35
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EBK CHEMISTRY: ATOMS FIRST
- 2.84 Early attempts to arrange the elements often focused on atomic weight. Mendeleev considered a number of properties in addition to atomic weight, so he realized that some elements seemed out of place when ordered by atomic weight. Using the modern periodic table, identify elements for which Mendeleev must have had to switch the order in order to get the correct sequence of elements.arrow_forwardOne of the best indications of a useful theory is that it raises more questions for further experimentation than it originally answered. How does this apply to Dalton’s atomic theory? Give examples.arrow_forward2.26 In what region of the periodic table are you likely to find elements that form more than one stable ion?arrow_forward
- 2-102 An element consists of 90.51% of an isotope with a mass of 19.992 amu, 0.27% of an isotope with a mass of 20.994 amu, and 9.22% of an isotope with a mass of 21.990 amu. Calculate the average atomic mass and identify the element.arrow_forward2.40 What distinguished the work of Mendeleev that caused scientists to accept his concept of the periodic table when others before him were not believed?arrow_forwardWhat evidence led to the conclusion that cathode rays had a negative charge?arrow_forward
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