Which compound contains both ionic and covalent bonds a. ki b. cacl2 c. ch2br2 d. nacn

D.NaCN contains both ionic and covalent bonds

Elements based on electrical conductivity can be divided into two elements, namely metal elements (conductors) and non-metals (non-conductors / insulators)

In modern periodic systems, the metal element is generally located on the left while the non-metal is on the right.

The formation of electron configurations such as noble gases can be done by sharing electrons with covalent bonds or hand over electrons with ionic bonds

Bonding that occurs due to electron handover. Can occur in metal and non-metal atoms. To get stability, atoms release or bind electrons to get stable electron regulation from noble gases

Bonding that occurs due to shared use of electron pairs

The two bound atoms contribute their electrons to produce bonds

Generally occurs in non-metallic elements

The small difference in electronegativity between two nonmetal elements results in a non-polar covalent bond. Whereas the greater electronegativity difference makes the compound ionic

So if the electronegativity difference between the atoms is greater than 1.7, the compounds formed are ionic.

An ionic bond occurs between metal K⁺ (group 1A) and non-metal I⁻ (group 7A)

An ionic bond occurs between the Ca²⁺ metal (group 2A) and the non-metal Cl⁻ (group 7A)

A covalent bond occurs between C, H and Br (all non-metal)

An ionic bond occurs between the Na + metal (group 1A) and CN- (cyanide) and the CN covalent bond between nonmetal C (class 4A) and nonmetal N (VA group)

ionic bonding

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type of chemical bond

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Lewis structures

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your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.