We can rewrite the equation KBr(aq) + AgNO3(aq) → AgBr(s) + KNO3(aq) into its net ionic equation into
K+ + Br- + Ag + + NO3- = AgBr + K + NO3-only aqueous solutions can dissociate. Spectator ions are present in both sides, hence these are K+ and NO3-. THe rules of assigning oxidation numbers is to identify the number of valence electrons of elements and may be arbitrary depending on the charge of the molecule.
Answer : The correct option is, (a) the energy level.
Explanation :
As we know that there are four quantum numbers :
- Principle Quantum Numbers : It describes the size of the orbital and the energy level. It is represented by n. Where, n = 1,2,3,4....
- Azimuthal Quantum Number : It describes the shape of the orbital. It is represented as 'l'. The value of l ranges from 0 to (n-1). For l = 0,1,2,3... the orbitals are s, p, d, f...
- Magnetic Quantum Number : It describes the orientation of the orbitals. It is represented as . The value of this quantum number ranges from . When l = 2, the value of will be -2, -1, 0, +1, +2.
- Spin Quantum number : It describes the direction of electron spin. This is represented as The value of this is for upward spin and for downward spin.
The first electron configuration quantum number describes the electron shell or the energy level of an atom. The value of 'n' ranges from 1 to the shell containing the outermost electron of that atom.
For example :
For :
(Because it is in 1st shell)
(Because it is in 's' orbital)
(Because l = 0)
(Because of the sign convention)
Hence, the correct option is, (a) the energy level.
Answer: gas particles that are in constant motion and exhibit perfectly elastic collisions
Explanation:
The correct answer for the question that is being presented above is this one: "A. The accepted model of the atom was changed.<span>" </span>J J Thomson discovered the electrons and performed experiment using the cathode ray tube
Here are the following choices:
<span>A. The accepted model of the atom was changed.
B. The accepted model of the atom was supported.
C. Cathode ray tubes were no longer used in experiments due to poor results.
D. Cathode ray tubes became the only instrument of use in the study of atoms</span>