Hollow spaces in earths crust

Is burning a chemical reaction or a physical change? Tick one box. chemical change physical change And then, explain why you chose your answer.

What does the atomic number tell you about an atomwhat two particles add up to equal the mass number?

What results electrons into having light produced by neon gas?

Describe the region in model 1 where the highest concentration of hydrogen ion (h+) is located.

Identify the examples of diffusion in the list below

What compares a law and a theory?

Explain what domain would best be represented by the "?" in the diagram. A) Eukarya because the organisms are all eukaryotic. B) Eukarya because the organisms are all prokaryotic. C) Bacteria because some of the organisms are autotrophs.

If you are eating a hamburger, it is an example of a consumer eating another consumer. a) true b) false

What mass of NaNO3 is needed to make 3.5 L of 2.2 M solution? (Na = 23.0g, N=14.0g, O=16.0g) Explain in steps

In which group do all atoms have seven valence electrons in the ground state?