Question

which of the following ground state atoms are paramagnetic? select all that are paramagnetic. mg ru h he zn question 10 1 pts put the following elements in order of increasing atomic radius according to periodic trends. al, zr, o, f, ba 1 choose 2 choose 3 choose 4 choose 5 choose

Explanation:

Step1: Recall paramagnetic - definition

Paramagnetic substances have unpaired electrons.

Step2: Analyze Mg

Mg has an electron - configuration of $1s^{2}2s^{2}2p^{6}3s^{2}$. All electrons are paired, so it is diamagnetic.

Step3: Analyze Ru

Ru has an electron - configuration of $[Kr]4d^{7}5s^{1}$. It has unpaired electrons in the 4d and 5s orbitals, so it is paramagnetic.

Step4: Analyze H

H has an electron - configuration of $1s^{1}$. It has one unpaired electron, so it is paramagnetic.

Step5: Analyze He

He has an electron - configuration of $1s^{2}$. All electrons are paired, so it is diamagnetic.

Step6: Analyze Zn

Zn has an electron - configuration of $[Ar]3d^{10}4s^{2}$. All electrons are paired, so it is diamagnetic.

Step7: Recall atomic - radius periodic trends

Atomic radius increases down a group and decreases across a period.

Step8: Locate elements on periodic table

O and F are in period 2, with O in group 16 and F in group 17. Al is in period 3, group 13. Zr is in period 5, group 4. Ba is in period 6, group 2.

Step9: Order elements by atomic radius

F < O < Al < Zr < Ba

Answer:

Paramagnetic atoms: Ru, H
Increasing atomic - radius order: 1. F, 2. O, 3. Al, 4. Zr, 5. Ba