Chemistry
The orientation of an atomic orbital is governed by

Magnetic quantum number
Principal quantum number
Azimuthal quantum number
Spin quantum number

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Chemistry
Man dies in the atmosphere of CO, because it

Dries up the blood
Combines with O2 present in the body
Combines with the haemoglobin of blood, thereby making the later incapable of absorbing O2
Reduces the organic matter of tissues

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