1. inter=London dispersion, dipole-dipole, hydrogen bond; intra=covalent, metallic, ionic; intramolecular is a misnomer because only the individual particles of covalent substances are called molecules (formula unit is used for ionic and metallic has no name for individual parts) 2. lowest: CH4, SiH4, GeH4,SnH4 (if you assume that the first ... Explanations:- When the covalent bond is formed between two different atoms then the more electron negative atom has and the less electron negative atom has charge. More is the electron negativity difference, greater is the charge separation.
Oct 28, 2020 · When the difference is very small or zero, the bond is covalent and nonpolar. When it is large, the bond is polar covalent or ionic. The absolute values of the electronegativity differences between the atoms in the bonds H–H, H–Cl, and Na–Cl are 0 (nonpolar), 0.9 (polar covalent), and 2.1 (ionic), respectively. Effect of Intermolecular forces on Melting Points and Boiling Points of Molecular Covalent Substances. Since melting or boiling result from a progressive weakening of the attractive forces between the covalent molecules, the stronger the intermolecular force is, the more energy is required to melt the solid or boil the liquid.
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