Describe one limitation of the earth model above

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?

Choose all the answers that apply. fluorine (f) has an atomic number of 9 and an atomic weight of 18.99. fluorine has a. 9 protons b. 10 neutrons c. 18 electrons d. an atomic mass of 19 e. at least one isotope

If two identical atoms are bonded,what kind of molecule is formed