Which element will not react with other elements. be ne fe?

Option (b) is the correct answer.

Explanation:

Atomic number of Be is 4 and its electronic distribution is 2, 2. So, to attain stability it loses two electrons. Hence, it is reactive in nature.

Atomic number of neon is 10 and its electronic distribution is 2, 8. As its valence shell is completely filled so, it neither loses or gain an electron.

Therefore, it is unreactive in nature.

Atomic number of Fe is 26 and its electronic configuration is .

Hence, to become stabilized it will readily lose an electron as half-filled d-shell is more stable in nature.

Thus, we can conclude that out of the given options Ne element will not react with other elements.

answer : third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol

explanation :

let us write down the given equations

equation 1 :

equation 2 :

equation 3 :

let us use hess's law to find out which 2 equations can be added to get the third equation.

let us reverse equation 2 and multiply it by 2. the new equation that we get is,

equation 4 :

let us add equation 1 & 4

the above equation is similar to equation 3 but has different value for dhrxn.

therefore third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol