Answer: Some signs of a chemical change are a change in color and the formation of bubbles. The five conditions of chemical change: color chage, formation of a precipitate, formation of a gas, odor change, temperature change.

5 0

4 years ago

Examine bohr's model about atoms?

True [87]

Here, I took this straight from the notes I took back when I learned this. If you need any more clarification, just say so.

<span>Bohr: Planetary model<span>Theorized that E- travel in specific orbits around the nucleus.The further an E- is from the nucleus, the higher its “energy.”The number of E- in the outermost orbital<span> determines the reactivity of an element.</span>
Bohr's model was a nucleus with concentric circles going around it representing the energy levels (where the electrons are in the atom). He was the first to demonstrate that the electrons in an atom orbit the nucleus, rather than stay in a consistent position. Google "Bohr Atomic Model" if you need any visual clarification. Hope I helped, and let me know if you need anything else!</span></span>

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3 years ago