Final answer:
At STP, strontium is the element that is malleable and a good conductor of electricity among the options provided.
Step-by-step explanation:
At Standard Temperature and Pressure (STP), the element from the given list that is malleable and a good conductor of electricity is strontium (b). Strontium is an alkaline earth metal, found in group 2 of the periodic table. These metals are known for their malleability and good electrical conductivity.
Diving into the specifics of the listed options:
- Silicon (a) is a metalloid and does not conduct electricity well.
- Bromine (c) is a halogen and is neither malleable nor a good conductor of electricity.
- Neon (d) is a noble gas and does not conduct electricity at all.
Hence, strontium is the correct answer as it exhibits the properties of malleability and conduction of electricity at STP.