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Chemical Bonds Reading

Poslední aktualizace 2 months ago

12 Dotazy

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Otázka 1

1.

What is a chemical bond?

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Otázka 2

2.

What happens when substances react?

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Otázka 3

3.

What are covalent bonds?

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Otázka 4

4.

What do metal atoms share in a metallic bond?

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Otázka 5

5.

When do ionic bonds form?

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Otázka 6

6.

Why does chlorine atom take an electron from the sodium?

Because atoms always try to add electrons.

Because it is far away from other atoms.

Because it will have 8 electrons in its outer shell.

Because it is mean.

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Otázka 7

7.

Why do the sodium and chlorine ions stick together?

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Otázka 8

8.

Why is digesting food an example of a chemical reaction?

Because it happens inside the body.

Because it forms new substances.

Because it involves reactants but no product.

Because the food doesn't change.

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Otázka 9

9.

How are reactants and products different?

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Otázka 10

10.

Why is it a chemical reaction when water forms from two hydrogen molecules and one oxygen molecule?

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Otázka 11

11.

What is different about the three kinds of chemical bonds?

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Otázka 12

12.

The last column of the periodic table has elements that have outer shells that are full of electrons. They are not very reactive. Why do you think they are not very reactive? (Think about ionic bonds.)