I. _______ is a life supporting component of air.
A. Hydrogen B. Helium C. Nitrogen D. Oxygen
II. The electronic configuration of Na+
is __________.
A. 2, 8 B. 2, 8, 1 C. 2, 8, 2 D. 2, 8, 3
III. The ionic compound used to make soap and detergent is ______.
A. Sodium chloride C. Calcium chloride
B. Sodium sulfate D. Potassium iodide
IV. _______ is an excellent conductor of electricity.
A. Lithium Iodide C. Barium Chloride
B. Potassium Iodide D. Sodium Chloride
V. A pair of electrons are mutually shared between two non-metals in _______.
A. Ionic bonds C. Covalent Bonds
B. Coordinate Covalent Bonds D. All of these
Answers
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Answer:
I. D
ii. A
III. B
IV. D
V. C
Explanation:
Oxygen is life supporting element as it helps in breathing. Na+ has 10 electrons k shell contains 2 while L shell contains 8.
NaCl is good conductor of electricity because it dissociates fastly. covalent bonds are pair of electrons Which are mutually shared.
May be I have made mistake in above, you also must confirm.
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