5. How A) 2 many protons does nygen (O) have? D) 16 1) 32 Which element is most
ID: 303088 • Letter: 5
Question
5. How A) 2 many protons does nygen (O) have? D) 16 1) 32 Which element is most similar in chemical reactivilty to nitrogen (N)? in 6. A) carbon(C B) oxygen (O) C) hydrogen 00 D) sulfur (S) ED phosphorous (P) 7. Electronegativity refers to an atom's ability to A) form hydrogen bonds. B) attract electroas C) emit radioactive particles D) form ionic bonds. E) none of the above What type of chemical bond is present within a single water molecule? S. A) hydrogen bond B) polar covalent bond C) nonpolar covalent bond D) ionic bond E) noncovalent bond 9. Which of the following solutions has the greatest concentration of protons [H']? A) tomato juice at pH 4 B) black coffee at pH5 C) seawater at pH 8 D) vinegar at pH 3 E) gastric juice at pH 2 10. Which of the following functional groups has acidic properties (acts like an acid) in an aqueous solution? A) SH B) NH2 C) 0-??? D) O-C E) CHExplanation / Answer
Answer 5
8
Because number of proton is equal to atomic number
Answer 6
Oxygen
Because Nitrogen exhibits positive oxidation states with oxygen because these elements are more electronegative than nitrogen.
Answer 7
Attract electrons
Because by forming a polar covalent bond Electronegativity of an atom is to attract a shared electron pair to itself,
Answer 8
Polar covalent bonds
Because Water molecules consist of two hydrogen atoms and one oxygen atom which held together by polar covalent bonds.
Answer 9
Gastric juice pH2
Because lower the pH more hydrogen ions concentration
Answer 10
O=C-OH
Because it is a carboxylic acid in which the presence of one carboxyl group.
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