3. Non-metal Elements | 非金属元素

📚 3. Non-metal Elements | 非金属元素

In KS3 chemistry, elements are divided into two large families: metals and non-metals. Non-metal elements are found on the right-hand side of the periodic table, and they show a wide range of physical states and chemical behaviours. This article reviews the key ideas you need to know about non-metal elements, including their properties, common examples, reactions and uses.

在 KS3 化学中，元素分为两大家族：金属和非金属。非金属元素位于周期表的右侧，它们表现出多种多样的物理状态和化学行为。本文回顾你需要掌握的非金属元素的关键知识，包括它们的性质、常见例子、反应和用途。

1. What Are Non-metal Elements? | 什么是非金属元素？

A non-metal element is an element that does not show the typical properties of a metal. Non-metals are poor conductors of heat and electricity, and they are usually dull in appearance. About 17 elements are classified as non-metals, including hydrogen, carbon, nitrogen, oxygen, phosphorus, sulfur and chlorine.

非金属元素是不表现出金属典型性质的一类元素。非金属通常导热和导电性差，外观暗淡无光泽。大约有 17 种元素被归类为非金属，包括氢、碳、氮、氧、磷、硫和氯。

At room temperature, non-metals can exist as gases (such as oxygen and nitrogen), as a liquid (bromine), or as solids (such as carbon and sulfur). Their varied states make them very useful in everyday life.

在室温下，非金属可以是气体（如氧气和氮气）、液体（溴）或固体（如碳和硫）。它们多样的状态使它们在日常生活中非常有用。

2. Position in the Periodic Table | 在周期表中的位置

Non-metals are located on the right-hand side of the periodic table. Hydrogen is the exception because it is placed at the top left, but it is still a non-metal. The non-metals include elements in groups 14 to 18, such as carbon, nitrogen, oxygen, fluorine and chlorine.

非金属位于周期表的右侧。

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