All of the elements in a family or group have similar chemical properties. which of the following statements best explains why this is true?

a. the elements in a group have the same number of protons in their nuclei.

b. the elements in a group have similar atomic mass numbers.

c. the elements in a group have the same number of valence electrons.

d. the elements in a group have similar atomic numbers.

Option C: Valence electrons; these are the ones that present the ease of forming links. These bonds can occur in different ways, either by exchange of these electrons, by sharing of pairs between the atoms in question or by the type of interaction that occurs in the metal bond, which consists of an "overlap" of bands.

The activation energy for the gas phase isomerization of methyl cis-cinnamate is 173.519 kJ

Explanation:-

According to the Arrhenius equation,

or,

where,

= rate constant at =

= rate constant at =

= activation energy for the reaction = ?

R = gas constant = 8.314 J/mole.K

= initial temperature =

= final temperature =

Now put all the given values in this formula, we get

Therefore, the activation energy for the reaction is, 173.519 kJ