The answer is 251.0 Hope I helped
Answer:
The number of electrons in an atom's outermost valence shell governs its bonding behaviour. Elements whose atoms have the same number of valence electrons are grouped together in the Periodic Table. ... To form a covalent bond, one electron from the halogen and one electron from another atom form a shared pair.
Answer:
Life, water, huge population of living organisms, biodiversity of species.
Explanation:
Earth is the only planet in our solar system that can maintain living organisms. It is the only planet in our solar system that is suitable for humans and animals to live on. Only planet with water suitable for a human/animal to drink. Many different types of species and organisms live on earth. And there is a large amount of living organisms living on earth.
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The limitation is that she can't test is on humans for ethical reasons. In order to test this, theoretically, she would need to ask some women to use this cosmetic and compare their fetuses to the fetuses of women who didn't. But this is not likely to be approved by the ethical committee, as causing damage to a fetus is not ethical.
