ding Quiz × Chemical Bonding Quiz empt/view.do attempt-18ccontext-0a4ce5300a0001
ID: 281481 • Letter: D
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ding Quiz × Chemical Bonding Quiz empt/view.do attempt-18ccontext-0a4ce5300a0001dc 13f1cd14e2fe 1fb3 Question1 Table salt is composed of Na and CT to form NaCl. This type of bond is Seleet one answer called:- o points A. Covalent B. @ lone c. Hydrogen D. Polar Question 2 Weak chemical bonds that form BETWEEN polar molecules are Select one answer A. Covalent bonds B. Hydrogen bonds c. Ionic bonds D. None of these answers are correct o points Question 3 What determines the number of covalent bonds formed by an atom? Seleet one answer A. Electrons in each orbital of the atom B. Electrons in the outer valence shell of the atom c. Valence shells in the atom D. Orbitals found in the atom o points Question 4 What do the four elements most abundant in life - carbon, oxygen, hydrogen and nitrogen have in common? one answer ho poests A. They are elements produced only in living cells. B. Each element exists in only one isotopic form. C. They all have the same number of valence electrons. D. They all have unpaired electrons in their valence shellsExplanation / Answer
Answer 1] Table salt is composed of Na+and Cl- to form NaCl .this type of bond is called
B]Ionic bond
explaination- Ionic bond is a chemical bond formed between two ions with opposite charges.it is formed when one atom gives up one or more electrons to another atom.
in NaCl there are two ions with opposite charges.in this example electrons from sodium atom is transferred to chloride atom.
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2] Weak chemical bonds that form between polar molecules are
B]Hydrogen bonds
explaination - Hydrogen bond is a weak bond between 2 molecules resulting from an electrostatic attraction between a proton in one molecule & an electronegative atom in the other.
example- bond in water molecules.
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3] What determines the number of covalent bonds formed by an atom
B]Electrons in the outer valence shell of the atom.
explaination - because covalent bond is formed when there is sharing of electron pairs of outermost shell between atoms.
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4] Carbon,oxygen,Hydrogen and nitrogen have in common
D]They all have unpaired electrons in their valence shell.
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