9 is B
6 is A
i’m not sure about the rest
Explanation:
A 57.9 g sample of glass is cooled by 2.70'C how much heat does it release
1560
Scientists use atomic mass units (amu) to measure atoms
Silicon is used in producing Pv celss because cells made from the crystallized polycrystalline silicon have efficiencies in the range of 14-18% and a moderate price.
Answer:
The rows on the periodic table are called periods. All the elements in a period have valence electrons in the same shell. The number of valence electrons increases from left to right in the period. When the shell is full, a new row is started and the process repeats.
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I hope it helps plz let me know if it is right or wrong.</h2>
