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Lina20 [59]
3 years ago
6

Why do the leaves outside change colors?

Chemistry
1 answer:
Allushta [10]3 years ago
7 0

Answer:

because the amount of pigments change as thee leaves prepare to fall from the trees

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Can anyone teach me what is criss cross method in chemistry​
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Answer:

In the criss-cross method, the numerical value of the ion charge of the two atoms are crossed over, which becomes the subscript of the other ion. Using this technique, we will write the chemical formula of the given compounds.

Criss cross the absolute values to give Al2O3. To find the formula for magnesium oxide:- The oxidation number of Mg is +2 and oxygen is -2. Criss cross the absolute values to give Mg2O2In this example there is a common factor of 2 so divide by 2 to give MgO.

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State the postulate of Bohr theory
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Answer:

Bohr's model of the hydrogen atom is based on three postulates:

1) An electron moves around the nucleus in a circular orbit,

2) An electron's angular momentum in the orbit is quantised,

3) The change in an electron's energy as it makes a quantum jump from one orbit to another is always accompanied by the emission or absorption of a photon. Bohr's model is semi-classical because it combines the classical concept of electron orbit (postulate 1) with the new concept of quantisation ( postulates 2 and ).

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3 years ago
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Its hydrogen atom is a high conductor of electricity
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They depend on the electrons from an atom being distributed among them or shared, within their specialized bonding orbitals.
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The answer to this is C
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