Paree las fuerzas intermoleculares descritas a continuacion con la letra correspondiente en el siguiente flujograma: NO NO Are ions present? YES Are polar molecules present? YES Are H atoms bonded to N, O, and F atoms? YES NO a b C Examples: CH?, Br? Examples: CH?F, HBr Examples: NH?, CH?OH Energies: 0.1-30 kJ/mol Energies: 2-15 kJ/mol Energies: 10-40 kJ/mol van der Waals forces Are polar molecules present? YES NO d Examples: NaCl dissolved in H?O Energies: >50 kJ/mol e Examples: KBr, NH?NO? Energies: >150 kJ/mol Increasing interaction strength Fuerzas de disperción solamente Choose... Fuerzas dipolo-dipolo Choose... Puentes de hidrógeno Choose... fuerzas ión-dipolo Choose... enlace ionico Choose...

Paree las fuerzas intermoleculares descritas a continuacion con la letra correspondiente en el siguiente flujograma: NO NO Are ions present? YES Are polar molecules present? YES Are H atoms bonded to N, O, and F atoms? YES NO a b C Examples: CH?, Br? Examples: CH?F, HBr Examples: NH?, CH?OH Energies: 0.1-30 kJ/mol Energies: 2-15 kJ/mol Energies: 10-40 kJ/mol van der Waals forces Are polar molecules present? YES NO d Examples: NaCl dissolved in H?O Energies: >50 kJ/mol e Examples: KBr, NH?NO? Energies: >150 kJ/mol Increasing interaction strength Fuerzas de disperción solamente Choose... Fuerzas dipolo-dipolo Choose... Puentes de hidrógeno Choose... fuerzas ión-dipolo Choose... enlace ionico Choose...

Transcript

00:01 Hello, hi students, let me explain you the question.

00:03 Here we have to describe the trend in electronegativity of elements.

00:09 So the electronegativity of elements...

00:15 So what is the trend of electronegativity of elements? as it moves from left to right across a period of periodic table.

00:26 So whenever we move from the left to right of the period table, so this is left, this is the right of the period.

00:38 So we call the rows in the period table as periods.

00:43 So whenever we move from left to right of a period of the periodic table, what is the electronegativity of elements trend? so our electronegativity of elements they are in the order.

01:02 So here, the electronegativity of elements are in the order.

01:05 Elements so electronegativity of elements it increases so it increases as we go from left to right in the across the period so electro negativity of elements increases as we go from left to right across a period left to right so why this happens because number of protons in the nucleus increases isn't it? so whenever we see from left to right number of protons increases, number of protons in the nucleus increases.

01:53 So as the number of protons increases, attraction also increases.

02:00 Attraction will increase.

02:03 So as the attraction increases, electronegativity of the elements also increases.

02:09 Then coming to the next question.

02:14 So describe the trend in the electronegativity.

02:19 So we have to explain the trend in electronegativity from top to bottom of a group in the periodic table.

02:27 So whenever we consider top to bottom, we called it as group.

02:31 So whenever we go from top to bottom, what is the trend of the electronic negativity of the elements in the group? so whenever we move from top to bottom of the group in the periodic table, the electronegativity of elements decreases as you move down the group.

03:03 So why this happens? because here increased amount of shielding by the innermost electrons.

03:08 So here increase the amount of shielding by the innermost electrons...

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