Answer:
Aluminum is ideal for aircraft manufacture because it's lightweight and strong. Aluminum is roughly a third the weight of steel, allowing an aircraft to carry more weight and or become more fuel efficient. Furthermore, aluminum's high resistance to corrosion ensures the safety of the aircraft and its passengers.
Explanation:
Lanthanide belongs to period 6, and actinides belongs to period 7
Answer: varriable
Explanation:meaning one element, feature or factor able to change
