### a) Definition of Atomic Mass Unit
The atomic mass unit (amu) is a standard unit of mass used to express atomic and molecular weights. It is defined as one twelfth of the mass of an unbound neutral atom of carbon-12 in its nuclear and electronic ground state. In terms of numerical value, 1 amu is approximately equal to $1.66053906660 \times 10^{-27}$ kilograms. This unit is crucial in chemistry and physics for comparing the mass of atoms and molecules.

### b) Examples of Polyatomic Ions
1. **Polyatomic Cation**: An example of a polyatomic cation is ammonium, represented as $ \text{NH}_4^+ $.
2. **Polyatomic Anion**: An example of a polyatomic anion is sulfate, represented as $ \text{SO}_4^{2-} $.

Polyatomic ions consist of two or more atoms covalently bonded that carry a charge, enabling them to participate in various chemical reactions.

Question

### a) Definition of Atomic Mass Unit
The atomic mass unit (amu) is a standard unit of mass used to express atomic and molecular weights. It is defined as one twelfth of the mass of an unbound neutral atom of carbon-12 in its nuclear and electronic ground state. In terms of numerical value, 1 amu is approximately equal to $1.66053906660 \times 10^{-27}$ kilograms. This unit is crucial in chemistry and physics for comparing the mass of atoms and molecules.

### b) Examples of Polyatomic Ions
1. **Polyatomic Cation**: An example of a polyatomic cation is ammonium, represented as $ \text{NH}_4^+ $.
2. **Polyatomic Anion**: An example of a polyatomic anion is sulfate, represented as $ \text{SO}_4^{2-} $.

Polyatomic ions consist of two or more atoms covalently bonded that carry a charge, enabling them to participate in various chemical reactions.

Knowee AI · Accepted Answer

### a) Definition of Atomic Mass Unit
The atomic mass unit (amu) is a standard unit of mass used to express atomic and molecular weights. It is defined as one twelfth of the mass of an unbound neutral atom of carbon-12 in its nuclear and electronic ground state. In terms of numerical value, 1 amu is approximately equal to $1.66053906660 \times 10^{-27}$ kilograms. This unit is crucial in chemistry and physics for comparing the mass of atoms and molecules.

### b) Examples of Polyatomic Ions
1. **Polyatomic Cation**: An example of a polyatomic cation is ammonium, represented as $ \text{NH}_4^+ $.
2. **Polyatomic Anion**: An example of a polyatomic anion is sulfate, represented as $ \text{SO}_4^{2-} $.

Polyatomic ions consist of two or more atoms covalently bonded that carry a charge, enabling them to participate in various chemical reactions.

a) Define atomic mass unitb) Give one example of a polyatomic cation and polyatomic anion respectively.

Question

a) Define atomic mass unit

b) Give one example of a polyatomic cation and polyatomic anion respectively.

Solution

a) Definition of Atomic Mass Unit

b) Examples of Polyatomic Ions

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