Answer:
D. nose,trachea,bronchi,alveoli
Explanation:
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Is this a question?
Cause if it is I dont understand it.
Answer:
beryllium has a higher ionization energy because its radius is smaller. boron has a higher ionization energy because its radius is smaller.
Carbon is located in the fourth group, second period. It is also in the nonmetal section of the table as well
Answer:
For neutral atoms, the number of valence electrons is equal to the atom's main group number. The main group number for an element can be found from its column on the periodic table. For example, carbon is in group 4 and has 4 valence electrons. Oxygen is in group 6 and has 6 valence electrons.
Explanation:
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