Wha characteristic of metallic bonds allow metals to be malleable and ductile

The metallic bond is ductile and malleable because they are not directly bonded with each other.  

Explanation:

Metallic bonds rise from electrostatic metallic forces between electrons and positively charged ions. In a metallic bond, electrons are free to move throughout the metallic structure.  

Metals are malleable as they can be beaten into sheets and ductile because they can be pulled into wires. This happens because atoms share electrons and can move freely throughout the structure.  

Example: Gold is more ductile and malleable when compare to silver and platinum.

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.