Answer:
boron only has 2 valence electrons
True.
<span>The trachea is about 10 cm long and it has an approximate diameter of 2 cm. It is located anterior to </span>(in front of) the esophagus and posterior to (behind) the isthmus of the thyroid. The right and left main bronchi are branches of the trachea. This division occurs at the level, or just below the level, of the sternal angle, also known as the manubriosternal joint.
Scientists often perform experiments to check and recheck their work. They also redo these experiments to ensure correct results.
D. it was based on his findings in South Africa.
