Next time you鸿运福彩app下载安装 reach for the salt shaker, think about this: what exactly is this common seasoning made of? Table salt is a combination, or a compound, of 2 chemical elements: sodium (Na) and chlorine (Cl). In this lesson, we’ll take a closer look at elements and their atoms, the building blocks of the universe!
In this lesson you鸿运福彩app下载安装 will:
- Identify chemical elements and compounds in everyday life
- Look at what makes up atoms, the building blocks of matter
- Explore the periodic table of elements
Photo: Piotr Sosnowski /