# If the spin quantum number could have three value how many elements would be in row one?

### How are the shapes of electron orbitals determined?

Shapes of electron orbitals are determined by solving the equation of quantum mechanics, also called as Schrodinger wave equation. Schrodinger equation's solution is the wave function which is centered around three quantum numbers which are: Principal Quantum Number : Determines the size, energy and shell of the orbital Azimuthal Quantum Number or Orbital angular momentum or Subsidiary quantum Number :-Determines the shape of orbital and energy of orbital to a little extent. Magnetic Quantum Number…

### What determines the number of elements found in each period?

The number of elements in each period is the sum of (1) the maximum number of electrons permitted in the quantum state characterized by the same number as the number of the period and (2) the maximum number of electrons permitted in a quantum state characterized by a lower quantum than the number of the period but with an energy level for the electron that is less than the energy state of the next electron…

### Can two electron have the same set of quantum number?

No. Electrons must have a different set of quantum numbers. This is Pauli's exclusion principle. In chemistry we talk about orbitals for example 3p orbitals, (three of them 3px, 3py, 3pz). Each orbital is defined by the three quantum numbers n, l, and m. Each of these orbitals can contain a maximum of two electrons, these have different spin quantum numbers, s. This is an example of Pauli's exclusion principle.

### What are the rules governing the combination of quantum numbers?

Rules Governing the Allowed Combinations of Quantum Numbers The three quantum numbers (n, l, and m) that describe an orbital are integers: 0, 1, 2, 3, and so on. The principal quantum number (n) cannot be zero. The allowed values of n are therefore 1, 2, 3, 4, and so on. The angular quantum number (l) can be any integer between 0 and n - 1. If n = 3, for example, l can be…

### How do you identify the number of elements in a compound?

The number of elements in a compound can be determined by looking at the chemical formula and identifying each element's symbol. For example, the compound CO2 has two elements, carbon and oxygen. Another example, glucose, has the formula C6H12O6, and has three elements, carbon, hydrogen, and oxygen.

### How do you determine the magnetic quantum number?

The magnetic quantum number, ml, is determined by first knowing the subshell, or angular momentum quantum number (l). The s subshell (l=0) has one orbital: ml=0 The p subshell (l=1) has three orbitals: ml=-1, 0, +1 The d subshell (l=2) has five orbitals: ml=-2, -1, 0, +1, +2 A more generic formula is: ml = -l to +l

### How many quantum numbers are used to describe the properties of electrons in atomic orbitals?

4 quantum numbers. The first is the principal quantum number, usually denoted n, which tells you the main energy level of the electron. This number is always a positive integer (i.e. 1,2,3...). The second is the angular momentum or someimtes called azimuthal quantum number, l (lowercase L), which describes the shape/type of the orbital. This number can be between 0 to n-1. 0 denotes s-orbital (sphere-like). 1 denotes p-orbital, 2 d, 3 f, 4 g…

### What number on the periodic table indicates the energy level of an atoms valence electrons?

The period gives you the outermost shell, the shell with the highest principal quantum number.. However the valence electrons may also include electrons in a lower shell. The aufbau principle shows which order the elements orbitals are filled by electrons. For the transition elements in period three the 3d orbital is higher in energy than the 4s so the 3d electrons should also be considered to be valence electrons. An example is iron which loses…

### From were the formula 2n square to determine the number of electrons derived?

Actually it is quite simple. If you are familier with the basics of the quantum theory you can see that the number of orbitals for any given principle quantum number is n^2. Since one orbital can carry a maximum of 2 electrons, the total number of electrons for a principle quantum number is 2 x n^2 = 2n^2 If you are unfamilier with quantum theory. It can be simplified like so - we know that…