yclasskc QUESTION 15 an eectron takes is untnown, but e is possibie to identry a

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yclasskc QUESTION 15 an eectron takes is untnown, but e is possibie to identry a region in space called a)(1. where an electron is QUESTION 16 Molecules that have he same chemical formula but difterent structures are known QUESTION 17 pH measures the proton concentration of what in an aqueous solution? A water molecules m B. proten moiecules C Hydrogen ions P. Hydroxide ons QUESTION 18 Due to hydrogen bonding, water molecules have a srong tendency to stick to each other. Ths is a property called ['1] QUESTION 19 Exmens are composed of partices caed Each contans a dense central nuceus made up of postively charged paricles cated and electicaty neutral negatwety charged particles caled move around the nucleus at some distance from t QuESTION 2 Click Sove and Submiat to poue and submit, Ciek Save All Ansuers to save all ansvers

Explanation / Answer

Ans. #15. An electron cloud.

#16. Isomers.

Two or more compounds having same molecular but different structural formula are called isomers of each other.

#17. C. hydrogen ions.

pH is a measure of proton (H+) in an aqueous solution. pH = -log [H+]

#18. Cohesion.

The “sticking together” of same kind of molecules is called cohesion.

The “sticking together” of different kind of molecules is called adhesion.

#19. Atoms, protons, neutron, electrons.  

#20. DNA, RNA

DNA is the genetic material.

RNA is a multifunctional group of molecules and is a key player is protein synthesis because mRNA is used as template for protein synthesis, tRNA carries species amino acids to ribosomes (the site of protein synthesis), 16s rRNA in larger ribosomal subunit forms peptide bonds between two amino acids, rRNA is also the major constituent of ribosomes.

#21. Carbon

The carbon element can form compounds with several types of other element to form a wide array of compounds- each with specialized functions.

#22. True.

Adenine, cytosine and guanine is common to both DNA and RNA. Thymine is present only in DNA. Uracil is present only in RNA.

#23. Molecule. Bond or chemical bond.

#24. Proteins                         – D. amino acids

            Nucleic acid               - A. Nucleotides

            Carbohydrates          - C. monosaccharides

            Lipids                          - B. Fatty acids bonded to organic molecules

#25. Proteins                         – D. Provide structural support and act as catalyst--

            Nucleic acid               - C. Encode and transmit genetic information

            Carbohydrates          - A

            Lipids                         - B

#26. Acidic. Basic. Neutral.   

#27. Negative.

#28. Valence electrons

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