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Likurg_2 [28]
3 years ago
11

Select the true statement:

Chemistry
1 answer:
Vsevolod [243]3 years ago
8 0

Answer:

Bonds are broken and new bonds are formed during chemical reactions only.

Explanation:

  • A physical change in a substance doesn't change what the substance is.
  • In a chemical change where there is a chemical reaction, a new substance is formed and energy is either given off or absorbed.
  • Physical changes can be reversed, chemical changes cannot be reversed with the substance changed back without extraordinary means, if at all. For example, a cup of water can be frozen when cooled and then can be returned to a liquid form when heated.

So, the right choice is:

Bonds are broken and new bonds are formed during chemical reactions only.

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Answer:

Option D and Option B

When comparing the two elements K and Ge , the more metallic element is_____K_____ based on periodic trends alone.

When comparing the two elements Sb and Pb , the more metallic element is_____Pb______ based on periodic

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The metallic characteristic increases when we move down a column in a periodic table or when we move left in the row.

Potassium and Germanium are located on the same row, but germanium lies on the right side of potassium. Thus, potassium (K) is more metallic than Germanium (Ge)

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the water concentration at equilibrium is

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