how do oxides change across a period from metallic to nonmetallic

As we move across a period from left to right in the Periodic Table, the nature of oxides changes from metallic to non-metallic. Here's how:

1. Metallic Oxides: At the start of the period (towards the left), elements are metals which form basic oxides. These metallic oxides when react with water form bases. For example, Sodium (Na) is a metal. When it reacts with oxygen, it forms Sodium Oxide (Na2O), which is a basic oxide.

2. Amphoteric Oxides: As we move towards the right, we encounter elements like Aluminum and Zinc which form amphoteric oxides. Amphoteric oxides are those which show both acidic as well as basic behavior. For example, Aluminum Oxide (Al2O3) reacts with both acids and bases to form salt and water, showing its amphoteric nature.

3. Non-Metallic Oxides: Further moving towards the right, non-metals start appearing which form acidic oxides. These non-metallic oxides when react with water form acids. For example, Sulfur (S) is a non-metal. When it reacts with oxygen, it forms Sulfur Dioxide (SO2), which is an acidic oxide.

So, in summary, as we move from left to right across a period in the Periodic Table, the nature of oxides changes from metallic (basic) to non-metallic (acidic) with some elements forming amphoteric oxides in between.

As we move across a period from left to right in the Periodic Table, the nature of oxides changes from metallic to non-metallic. Here's how:

1. Metallic Oxides: At the start of a period, elements are metals which form basic oxides. These metallic oxides are ionic in nature. They react with water to form alkalis. For example, sodium (Na) is a metal and it forms a basic oxide (Na2O).

2. Amphoteric Oxides: As we move towards the right, elements start forming amphoteric oxides. These oxides show both acidic and basic properties. For example, aluminium (Al) forms an amphoteric oxide (Al2O3).

3. Non-Metallic Oxides: Further moving to the right, elements are non-metals which form acidic oxides. These non-metallic oxides are covalent in nature. They react with water to form acids. For example, sulfur (S) is a non-metal and it forms an acidic oxide (SO2).

So, the nature of oxides changes from basic (metallic) to amphoteric to acidic (non-metallic) as we move from left to right across a period in the Periodic Table.