Engineers are looking for a new material to build an oil tanker. The material must be lightweight, strong, and durable. Several engineers have developed some initial plans. The engineers are in which stage of technological design? A) identifying a problem or need B) designing a solution C) implementing a solution D) evaluating a solution

designing a solution

Explanation:

i found the answer on quizlet lol

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.