Pure substance - Ice cubes
Mixture - Homogenous sea water , lemonade
Pure substance are the substance which have constant chemical composition and characteristic.
Mixture is material made up of two or more chemical substance which are not chemical bonded. These materials in mixture are not in definite proportion.
As water ice cubes has only water in it thus it is pure substance.
Homogeneous sea water contains various salts and impurities in it thus it is mixture.
Lemonade contains lemon juice and water in it . Thus, it is mixture.
To know more about pure substance and mixture
brainly.com/question/6459860
#SPJ4
Self-condensation is a natural response in which a synthetic compound containing a carbonyl gathering acts both as the electrophile and the nucleophile in an aldol condensation. A condensation response in which two of a similar atom are consolidated. This aldol condensation is a self-condensation response since two particles of CH3)2CO consolidate to frame the item. This blended Claisen buildup is not a self-condensation response in light of the fact that the two ester reactants are not indistinguishable.
Hey there!
Here is the answer to your question.
Answer : <em>4) The total number of electrons increases down the group, and this increases the strength of the intermolecular forces.</em>
<em></em>
I hope this helps you! Let me know if you need anymore help on anything you are struggling with! ☺
What is the similarity between chlorine and bromine?
Chlorine and bromine have very similar chemical properties and are best explained by the fact that they both belong to the category of halogens.
Similarities shared by halogens:
Chemical elements are represented as periods and groups on a periodic table. Chemical elements with comparable properties make up each category. Halogens are group 17 elements that are primarily non-metallic.
In the case of halogens, each element's atom possesses seven valence electrons, 
, in which n stands for the energy level. The electron configuration of chlorine is ![[Ne]3s^{2} 3p^{5}](https://tex.z-dn.net/?f=%5BNe%5D3s%5E%7B2%7D%203p%5E%7B5%7D)
, and the electron configuration of bromine is ![[Ar]3d^{10}4s^{2} 4p^{5}](https://tex.z-dn.net/?f=%5BAr%5D3d%5E%7B10%7D4s%5E%7B2%7D%204p%5E%7B5%7D)
.
Because of comparable electron configurations, elements of the same group have similar properties. The number of valence electrons, which are located in the outermost (highest energy) s and p orbitals, is particularly similar.
Learn more about halogens here;
brainly.com/question/4725757
#SPJ4
