To calculate the average atomic mass, multiply the fraction by the mass number for each isotope, then add them together.
Seven valence electrons is your answer
Answer:
Explanation:
The metallic properties of steel would strongly not favor its use in construction of aircraft.
Steel is an alloy of carbon and iron. It is denser and generally weighs more than equivalent amount of aluminum. This would imply that the weight of aircrafts would be much more heavier than usual. Weight is a very key component in construction of aircraft. The lighter the mass, the faster propellers can move the craft and lesser amount of energy used. The weight would be a major problem.
Although alloying iron and carbon improves the resistant of the steel to corrosion, it still cannot be compared to that of aluminium. We would build airplanes that would not be durable for so long and that can readily rust on frequent usage.
<span>A single proton and a single electron.</span>
