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How many valence electrons are there in an atom with the electron configuration [noble gas]ns2(n − 1) d8?
Water Supply
The provision or availability of water for various uses, including drinking, irrigation, and industrial needs, through natural or artificial means.
Mineral Supply
The availability of inorganic substances necessary for various life processes and industrial applications, often extracted from the Earth's crust.
Humus
Organic component of soil formed by the decomposition of leaves and other plant material, rich in nutrients.
Weathered Rock
Rock that has been altered in physical composition or chemical properties by environmental factors such as water, wind, or temperature changes.
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