Question

1) Difference between elements and compounds.
2)Diagrammaticaily show the difference between the three types of muscle fibres.​

Answer 1

Answer:

1. Definition:A compound contains atoms of different elements chemically combined together in a fixed ratio. An element is a pure chemical substance made of same type of atom.

Composition:Compounds contain different elements in a fixed ratio arranged in a defined manner through chemical bonds. They contain only one type of molecule. Elements that compose the compound are chemically combined. Elements contain only one type of atom. Each atom has the same atomic number i.e., the same number of protons in their nucleus.

Ability to break down:A compound can be separated into simpler substances by chemical methods/reactions. Elements cannot be broken down into simpler substances by chemical reactions.

Types:A huge, virtually limitless, number of chemical compounds can be created. Compounds are classified into molecular compounds, ionic compounds, intermetallic compounds and complexes. There are about 117 elements that have been observed. Can be classified as metal, non-metal or metalloid.

Explanation:

2. Three types of muscle fibres are smooth muscle (non-striated), cardiac muscles and skeletal muscles (striated muscles).