Nahco₃ is
a. a strong acid
b. a strong base
c. a weak acid
d. a weak base
e. a salt (made from an acid and a base)

Sodium hydrogen carbonate is a weak base because it is not a water soluble hydroxide.

Its strengthits conductivity of heat and electricity its shiny colourmalleable and ductility

Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.