Answer:
There are no unpaired electrons.
Explanation:
There are no unpaired electrons in the Lewis symbol for a nitride ion().The nitride ion has a charge of -3. The negative charge on the Nitride ion indicates a gain in electrons . Nitrogen has 5 valence electrons that is the number of electrons that are in its outer shell .The total number of electrons that the nitride ion has is equal to 5+3 = 8 electrons . Electrons usually appear in pairs and obey the octet rule therefore the nitride ion has four electron pairs no unpaired electrons.
Answer:
C. It has no delocalised electrons and each carbon atom forms four covalent bonds with other carbon atoms.
Explanation:
- Diamond is composed solely by carbon atoms. As the difference of electronegativity between atoms is 0, diamond is a <em>fully covalent compound</em>.
- The lack of electrical conductivity stems from a<em> lack of available electrons</em>, this means that there are no delocalised electrons.
The information in the first point discards options A and D, while the second point discards option B. Thus the answer is option C.
Answer:
135.0 g
Explanation:
the block read 100, 30, and 5 putting those together makes 135.00 g
Answer:
Will the electronegativity of barium be larger or smaller than that of strontium? Explain. EN of Ba (0.89) is smaller than EN of Sr (0.95). Because of larger size and more inner core e- shielding, Barium will more readily share its valence electron in the 6s sublevel than Sr will share it valence e- in the 5s sublevel.
Explanation:
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I think the answer is systems tend to undergo changes towards lower energy and higher entropy.
Usually the point of chemical reactions is to go from a state of higher energy to lower energy (it is possible for reactions to go from lower to higher energy though as in the case of endothermic reactions).
As for entropy, usually it requires energy to lower the entropy of a system since entropy can be thought of as the relative disorder of the system. If you go from a state of higher disorder to lower disorder work usually needs to be done.
This trend can be shown in the equation ΔG=ΔH-TΔs:
ΔG stands for Gibbs free energy
ΔH stands for change in enthalpy
ΔS stands for change in entropy
T stands for temperature
when ever ΔG is negative the reaction is spontaneous which means that it is favored. As you can see ΔG is negative at any temperature when ΔH is negative and ΔS is positive showing that going to a lower energy state and raising the entropy is usually favored in nature.
I hope this helps. Let me know if anything is unclear or if you need further explanation.