Can i get explanation about bond pair electrons?

During a flame test, ions of a specific metal are heated in the flame of agas burner. A characteristic color of light is emitted by these ions inthe flame when the electrons (1) gain energy as they return to lower energy levels (2) gain energy as

How many significant figures are in 3246.90890

Nitrogen makes up what percentage of the mass of the human body

Why is there such a vast climate difference in these two areas of the grand canyon the inner canyon and north rim?

Which statement about the Nobel gases is most reliable

Match the factors which affect the rate of dissolving/dissociation/diffusion.

How would the equilibrium of an exothermic reaction at 25°c be affected if the temperature of the system were reduced? (hint: apply le chatelier's principle) ?

Which is the most practical argument for the continued funding of space exploration? a) Space exploration will one day show whether life exists on other planets in star systems similar to ours.

33 protons 36 electrons 45 neutrons

The periodic table includes all of the known elements in the world. how are elements arranged on the periodic table?