How is a compound different from an element 2.3 lesson check?

Element: Element are pure substance consist of same type of atomsCompound: Form by combination of atoms of different elements.

Distinguish features:

Compounds represented by chemical formula while elements are represented by symbols.Compounds have fixed ratios of atoms of different elements while in elements are distinguished by atomic no.Compounds can be converted into simple substance by chemical methods but the elements cant be converted into simpler substance by means of chemical methods.

Example:

Water (H2O) is a compounds.Iron (Fe) is an element.

Summary:

When two or more elements are mixed then compounds are formed.

Mg-26 and mg-24 are pair of isotopes. isotopes are defined as atoms of the same element having same atomic number but different mass number. i hope that was .