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tia_tia [17]
3 years ago
7

Chemical reactions that ____ energy will not occur without a source of energy

Chemistry
1 answer:
andrezito [222]3 years ago
4 0
Chemical reactions that release energy will not occur without a source of energy.  So the answer is release.
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Give explanations for the large drops in melting point from C to Si and from Ge to Sn.
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As we move down the group, the metallic bond becomes more stable and the formation of forming covalent bond decreases down the group due to the large size of elements.

Covalent and metallic bonding leads to higher melting points. Due to a decrease in attractive forces from carbon to lead there is a drop in melting point.

Carbon forms large covalent molecules than silicon and hence has a higher melting point than silicon.

Similarly, Ge also forms a large number of covalent bonds and has a smaller size as compared to that of Sn. Hence melting point decreases from Ge to Sn.

The order will be C>Si>Ge>Pb>Sn.

To learn more about the covalent bond, visit: brainly.com/question/10777799

#SPJ4

3 0
1 year ago
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Dmitriy789 [7]

Answer:

Explanation:

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3 0
3 years ago
Answer the question below. Use the rubric in the materials for help if needed.
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8 0
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Murljashka [212]

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so the answer is volume



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