Water is a pure substance because it is not refined like the other materials. Hope this helps!!!
Answer:
Abiotic factors are the non-living components of the ecosystem, including its chemical and physical factors.
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The force that accelerates objects towards Earth is gravity.
It depends on the number of valence electrons required to make octet or duplet( in case of H)
. For example, Nitrogen(atomic number = 7) has electronic configuration(2,5) which means nitrogen has 5 valence electrons and requires 3 more electrons to complete its octet. After gaining 3 electrons from atoms of an element with less electronegativity than N, it forms nitride ion (
).
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