Offer your rationale for dividing chemical elements into three types: metals, non-metals, and noble gases. Write down examples of chemical signs for each type of element. Read them.
Chemical elements are divided into metal elements and non-metal elements. Non-metallic elements also include inert chemical elements, but they do not react or react poorly with other substances, therefore they are separated into a separate group.
Write down examples of chemical signs for each type of element. Read them.
Metals: Li – lithium, Na – sodium, K – potassium, Ca – calcium, Al – aluminum, Fe – iron and others.
Non-metals: H – hydrogen, O – oxygen, C – carbon, S – sulfur and others.
Noble gases: Ne – neon, Ar – argon, Kr – krypton, Xe – xeon, Rn – radon.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.