Common porperties of iron water and air

If two atoms are bonded to a central atom with no lone pairs,how will they be arranged

What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?

Skills of homo sapiens were found an excavation. the skulls were preserved because the bodies were frozen. so, these fossils are (blank) fossils.the image shows the evolution of skulls beginning 2 to 3 million years ago. based on the image, modern human skulls(blank) ape skulls.