C. the expansion of the universe is accelerating
The correct answer is C-C bond has the longest covalent bond distance.
However, the corresponding CC bonds are weaker than the CN double and triple bonds. The strength of the C-N single bond is not always affected by its ionic or polar nature. Polar bonds like the F-H or O-H bonds, for instance, are among the strongest single bonds. The distance between the nuclei of the two atoms connected by a bond is known as the bond length. we may say that the total of the covalent radii of two bound atoms is nearly equivalent to the bond length. The angstrom unit serves as the standard unit of measurement for bond length. Several methods, including rotational spectroscopy, X-ray diffraction, and neutron diffraction, can be used to measure the bond length.
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A compound differs from a mixture in that a compound has a definite composition by the elements that the compound contains.
Answer:
A. Wild life survey
Explanation:
The only answer that involved observing the wild life
Sodium - metallic bonding
Oxygen - covalent bonding
Sodium chloride - ionic bonding
Magnesium oxide - ionic bonding
Nitrogen fluoride - covalent bonding
Aluminium - metallic bonding
Calcium hydroxide - ionic bonding
Silicon fluoride - covalent bonding (not 100% sure on this one)
Chlorine - covalent bonding
Potassium oxide - ionic bonding