What is the capital of washington

As you move from right to left on the periodic table the atomic radius fill in the blank

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.

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?