Which substance contains metallic bonds (1)hg (2)h2o (3) nacl (4)c6h12o6

(1)

Explanation:

A covalent bond is formed when an element shares its valence electron with another element. This bond is formed between two non metals. Example: and

An ionic bond is formed when an element completely transfers its valence electron to another element. The element which donates the electron is known as electropositive element and the element which accepts the electrons is known as electronegative element. This bond is formed between a metal and an non-metal. Example:

Metallic bond is defined as the bond which is formed between positively charged atoms having free electrons and are shared among a lattice of cations. This is usually formed between metals. Example:

the temperature of the gas, in k, not celsius.