The reaction of atomic N with neutrons in the upper atmosphere
Answer:
The answer is "Option D".
Explanation:
The entire ionic equation for all the substances, which are ionic compounds but are available in an aquatic is represented in the form with ions in the full ionic equation.
In the Net ionic equation, it doesn't have the particulate matter throughout the net ionic equations throughout the equations.
In the Spectator ions, it doesn't participate in interactions mostly on reaction and the material hand. From both sides, the very same ions are present.
The evenly balanced chemical formula is,
It is the separate organic compound that full ion formula will match the choice D.
3rd level would able to hold a max of 18 elelctrons
Answer:
0.365 m
Explanation:
The <em>definition of molality</em> is:
- molality = moles of solute / kg of solvent
First <u>we calculate the moles of the solute, LiCl</u>. We do so using its <em>molar mass</em>:
- 0.317 g ÷ 42.394 g/mol = 7.48x10⁻³ mol
Then we calculate the mass of the solvent, water. We do so using its <em>density</em>:
- 20.5 mL * 0.9982 g/mL = 20.5 g
- 20.5 g / 1000 = 0.0205 kg
Finally we <u>calculate the molality of the solution</u>:
- 7.48x10⁻³ mol / 0.0205 kg = 0.365 m
Answer:
a) Ionic bonding
Covalent bonding
Metallic bonding
b) Electrons with the same state must have opposite spins.
Electron state can hold no more than two electrons.
Explanation:
a) When an atom loses electrons it became a cation, with a positive charge, and when an atom gain electrons it became an anion, with a negative charge. Because of the attraction of the opposite charges, the ions form a bond, which is called ionic bonding.
When atoms share electrons to complete the octet rule, they form a molecule by covalent bonding.
When a metal loses its valence electrons, they form a "sea of electrons" and the cations are "glued" by them, which is called metallic bonding.
b) The Pauli exclusion principle determinants that two electrons can not occupy the same state at the same time, it means that two electrons can't have the same four quantic number equal. If they are at the same shell, they must have different spins. The electron can have only two spin (-1/2 or +1/2) so the electron state can hold no more than two electrons, and they have to have opposite spins.
