3 years ago

Metals and nonmetals all lesson explanation for class 8

Chemistry

1 answer:

WINSTONCH [101]3 years ago

7 0

Answer:

Metalloids elements whose properties are intermediate between those of metals and solid nonmetals or semiconductors.

Some examples:

Chemical element.

Boron.

Semiconductor.

Arsenic.

Silicon.

Selenium.

Antimony.

Germanium.

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M_r: 58.32

Mg(OH)₂ + … ⟶ … + 2HOH

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(a) Moles of Mg(OH)₂

$\text{Moles of Mg(OH)$_{2}$} =\text{58.3 g Mg(OH)$_{2}$} \times \dfrac{\text{1 mol Mg(OH)$_{2}$}}{\text{58.32 g Mg(OH)$_{2}$}}\\\\=\text{0.9997 mol Mg(OH)$_{2}$}$

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Metals and nonmetals all lesson explanation for class 8​

Metals and nonmetals all lesson explanation for class 8