Elements X, Y and Z have atomic numbers 19,37 and 55 respectively. Which of the following statements is true about them?

Question

Elements X, Y and Z have atomic numbers 19,37 and 55 respectively. Which of the following statements is true about them? (A) Their ionisation potential would increase with increasing atomic number. (B) Y would have an ionisation potential between those of X and Z (C) Z would have the highest ionisation potential. (D) Y would have the highest ionisation potential.

Tardigrade Admin · Accepted Answer

Elements X, Y and Z with atomic numbers 19,37,55 lie in group 1 (alkali metals). Within a group, I E decreases from top to bottom. Therefore, I E of Y could be between X and Z.

Q. Elements $X, Y$ and $Z$ have atomic numbers $19, 37$ and $55$ respectively. Which of the following statements is true about them?

Their ionisation potential would increase with increasing atomic number.

$Y$ would have an ionisation potential between those of $X$ and $Z$

$Z$ would have the highest ionisation potential.

$Y$ would have the highest ionisation potential.

Elements $X, Y$ and $Z$ with atomic numbers $19, 37, 55$ lie in group $1$ (alkali metals). Within a group, $I E$ decreases from top to bottom. Therefore, $I E$ of $Y$ could be between $X$ and $Z$ .

Q. Elements X,Y and Z have atomic numbers 19,37 and 55 respectively. Which of the following statements is true about them?

Their ionisation potential would increase with increasing atomic number.

Y would have an ionisation potential between those of X and Z

Z would have the highest ionisation potential.

Y would have the highest ionisation potential.

Elements X,Y and Z with atomic numbers 19,37,55 lie in group 1 (alkali metals). Within a group, IE decreases from top to bottom. Therefore, IE of Y could be between X and Z.

Q. Elements $X, Y$ and $Z$ have atomic numbers $19, 37$ and $55$ respectively. Which of the following statements is true about them?

$Y$ would have an ionisation potential between those of $X$ and $Z$

$Z$ would have the highest ionisation potential.

$Y$ would have the highest ionisation potential.

Elements $X, Y$ and $Z$ with atomic numbers $19, 37, 55$ lie in group $1$ (alkali metals). Within a group, $I E$ decreases from top to bottom. Therefore, $I E$ of $Y$ could be between $X$ and $Z$ .