For each name, the formula and for each formula the name is to be written: Co 3+ , Zn 2+ , aluminium ion, chromium(III) ion. Concept introduction: Mostly, the elements are found as single atom particles in the universe. For example, the element which exists in the gas phase as single atoms at temperatures is Helium and the element which found in the solid phase is Lithium. The elemental symbol is used to denote this one atom elements and further explain that these atoms are uncombined in nature. The elements which are in between metals and non-metals are denoted as metalloids or semi metals. When atom accepts or loses electrons it is termed as ion. If the ion loses an electron and accepts a positive charge it is called as cation. Similarly, if the ion gains an electron and accepts a negative charge it is called an anion. When the ion is formed from a single atom, it is referred as monatomic ion. Generally, naming of group 1A, 2A(1-2), and 5A-7A(15-17) will not include the charge of ion. Ex; Na + (sodium ion). Similarly, when naming transition metal ion, having one element with two or more oxidation state, the name includes the charge of ion. Ex: Fe 2+ , Fe 3+ (iron(II) ion and iron(III) ion).

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Chapter 6, Problem 6PE

Interpretation Introduction

Interpretation:

For each name, the formula and for each formula the name is to be written: Co³⁺, Zn²⁺, aluminium ion, chromium(III) ion.

Concept introduction:

Mostly, the elements are found as single atom particles in the universe. For example, the element which exists in the gas phase as single atoms at temperatures is Helium and the element which found in the solid phase is Lithium. The elemental symbol is used to denote this one atom elements and further explain that these atoms are uncombined in nature. The elements which are in between metals and non-metals are denoted as metalloids or semi metals. When atom accepts or loses electrons it is termed as ion. If the ion loses an electron and accepts a positive charge it is called as cation. Similarly, if the ion gains an electron and accepts a negative charge it is called an anion. When the ion is formed from a single atom, it is referred as monatomic ion. Generally, naming of group 1A, 2A(1-2), and 5A-7A(15-17) will not include the charge of ion. Ex; Na⁺ (sodium ion). Similarly, when naming transition metal ion, having one element with two or more oxidation state, the name includes the charge of ion. Ex: Fe²⁺, Fe³⁺ (iron(II) ion and iron(III) ion).

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