Answer: bromine
Explanation: Thus bromine would release most energy while adding an an electron to a neutral atom in the gas phase.
Definitely D. Abiotic means non-living and all creatures mentioned are alive except minerals.
The given atom with 7 valence electrons is most likely to gain one more electron to achieve a full octet.
Given:
An atom with 7 valence electrons
To find:
Number electrons to achieve full octet by a given atom
Solution:
- The number of valence electrons in a given atom is 7.
- The number of valence electrons is 7 which means that the given atom will be a member of the halogen family.
- And as we know that halogen possesses one less electron to complete their octets. They by gaining one electron they achieve full octet and stability.
Similarly, the given atom with 7 valence electrons is most likely to gain one more electron to achieve a full octet.
Learn more about octet and valence electrons here:
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Answer: is the limiting reagent
Explanation:
To calculate the moles :
The balanced chemical reaction is :
According to stoichiometry :
1 moles of require = 2 moles of
Thus 0.625 moles of will require= of
Thus is the limiting reagent as it limits the formation of product and is the excess reagent as it is present more than the required amount.
D requires additional information like the heats of formation for compounds in the equation, and they're not found on periodic table.