Which of the following statements is true? A. Lithium will react to give up an electron however that electron can only be used to make an anion of a metal B. Lithium is most easily oxidized of the metals listed on the activity series and therefore it will most easily give electrons to metal cations C. Lithium is least easily oxidized of the metals listed on the activity series and therefore it is least likely to give electrons to metal cations D. Lithium will only react with metal ions that require the addition of one electron because of the fact that lithium only gives up one electron

The following statements are true:

Explanation:

When a neutral atom loses an electron then it forms a positive ion due to the decrease in number of electrons. This positive ion is also known as cation.

For example, atomic number of lithium is 3 and its electronic configuration is . It will attain stability by losing an electron.

Whereas when a neutral atom tends to gain electrons then it acquires a negative change and hence leads to the formation of a negative ion. This negative ion is also known as anion.

As the atomic size of lithium is very small as compared to other elements of its group. So, it is difficult to extract an electron from lithium atom hence, it is not easily oxidized.

Therefore, we can conclude that the following statements are true:

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