Metal Elements | 金属元素

📚 Metal Elements | 金属元素

Metals are a large and important group of elements on the periodic table. They are all around us, from the aluminium in drink cans to the iron in bridges and the copper in electrical wires. In this KS3 chemistry article, we will explore the main physical and chemical properties of metals, how they react with oxygen and acids, and why the reactivity series helps us predict their behaviour.

金属是元素周期表中一大类重要的元素。它们在我们身边随处可见，从饮料罐中的铝，到桥梁中的铁，再到电线中的铜。在这篇 KS3 化学文章中，我们将学习金属的主要物理性质和化学性质、它们与氧气和酸的反应，以及为什么金属活动性顺序能帮助我们预测它们的行为。

1. What Is a Metal Element? | 什么是金属元素

An element is a pure substance made of only one type of atom. Metal elements are found mainly on the left-hand side and in the centre of the periodic table, and most of the elements in the periodic table are metals.

元素是由同一种原子组成的纯净物。金属元素主要位于元素周期表的左侧和中部，元素周期表中的大多数元素都是金属。

Common examples include iron (Fe), copper (Cu), aluminium (Al), gold (Au), silver (Ag), zinc (Zn), magnesium (Mg), sodium (Na), potassium (K) and calcium (Ca). At room temperature, almost all metals are solids; mercury (Hg) is the only common metal that is a liquid.

常见的例子包括铁（Fe）、铜（Cu）、铝（Al）、金（Au）、银（Ag）、锌（Zn）、镁（Mg）、钠（Na）、钾（K）和钙（Ca）。在室温下，几乎所有金属都是固体；汞（Hg）是唯一常见的液态金属。

2. Physical Properties of Metals | 金属的物理性质

Metals have a characteristic shiny appearance when they are polished or freshly cut. This property is called metallic lustre.

金属经过抛光或新切开时具有特有的光泽，这种性质叫做金属光泽。

They are excellent conductors of heat and electricity. For example, copper is used in electrical wires because it allows electric current to flow

Published by TutorHao | KS3 Chemistry Revision Series | aleveler.com

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