Regents Chemistry Practice Problems : PERIODIC TABLE AND TRENDS

Electronegativity is a term that represents the strength of attraction that an atom has for the electrons in a chemical bond. Choice 2 is the correct answer choice.

Allotropes are different forms of the same element, such as O2 and O3. Allotropes have different properties and structures. Choice 4 is the correct answer choice.

The higher the electronegativity difference, the more polar the bond is. Electronegativity values can be found in Table S on the Reference Table. To find electronegativity difference, we have to subtract the smaller electronegativity value from the larger one.
Choices 1 and 2 can be eliminated since both atoms forming the bond are the same, resulting in electronegativity difference of 0.
HCl will have the highest electronegativity difference. Choice 3 is the correct answer choice.

Allotropes are different forms of the same element, such as O2 and O3. Allotropes have different properties and structures. Choice 2 is the correct answer choice.

The electronegativity difference between atoms is used to determine the polarity of the bond in a molecule. The higher the electronegativity difference, the more polar the bond is. Choice 3 is the correct answer choice.

Diamond and graphite are two different forms of the same element that have different structures. Choice 4 is the correct answer choice.

Ionization energy for every element can be found in Table S on the Reference Table. Alternatively, you can remember that ionization energy increases up and to the right on the Periodic Table. Choice 3 is the correct answer choice.

Electronegativity is a measure of attraction for electrons in a chemical bond. Electronegativity values for every element can be found in Table S on the Reference Table. Fluorine is the most electronegative element. Choice 1 is the correct answer.

First ionization energy increases up and to the right on the Periodic Table. Alternatively, you can look up the value of ionization energy for Be and Ba in Table S on the Reference Table. Atomic radius can be also be found in Table S. Atomic radius increases to the left and down on the Periodic Table. Choice 2 is the correct answer.