8.1

Arrangement of elements

10 flashcards to master Arrangement of elements

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Definition Flip

How are elements arranged in the Periodic Table?

Answer Flip

Elements are arranged in periods (rows) and groups (columns) in order of increasing proton number/atomic number. Elements in the same group have similar chemical properties.

Key Concept Flip

What is the general trend in metallic character across a period?

Answer Flip

The metallic character decreases across a period. Elements on the left side of the periodic table are more metallic than the ones on the right side.

Key Concept Flip

What is the relationship between group number and the charge of ions formed?

Answer Flip

The group number often indicates the charge of the ions formed from elements in that group.

Example: Group 1 elements form +1 ions (e.g., Na⁺), Group 2 elements form +2 ions (e.g., Mg²⁺), and Group 7 elements form -1 ions (e.g., Cl⁻).
Key Concept Flip

Why do elements in the same group have similar chemical properties?

Answer Flip

Elements in the same group have the same number of valence electrons (outer shell electrons). This leads to similar chemical reactions and properties due to similar electronic configurations.

Key Concept Flip

How can the position of an element in the Periodic Table be used to predict its properties?

Answer Flip

The position indicates metallic/non-metallic character and reactivity.

Example: elements in Group 1 are highly reactive metals, while elements in Group 18 are inert gases.
Key Concept Flip

Give an example of a Group 7 element at room temperature.

Answer Flip

Fluorine (F₂) is a gas, Bromine is a red-brown liquid, and Iodine is a solid. Astatine (At) is also in group 7.

Definition Flip

Answer Flip

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Key Concept Flip

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Key Concept Flip

What is used to test for the presence of water?

Answer Flip

Anhydrous copper(II) sulfate or cobalt chloride paper can be used to test for water. Anhydrous copper(II) sulfate changes from white to blue in the presence of water: CuSO₄(s) + 5H₂O(l) → CuSO₄·5H₂O(s). Cobalt chloride paper changes from blue to pink.

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7.4 Oxides 8.2 Group I - Alkali metals

Key Questions: Arrangement of elements

How are elements arranged in the Periodic Table?

Elements are arranged in periods (rows) and groups (columns) in order of increasing proton number/atomic number. Elements in the same group have similar chemical properties.

About Arrangement of elements (8.1)

These 10 flashcards cover everything you need to know about Arrangement of elements for your Cambridge IGCSE Chemistry (0620) exam. Each card is designed based on the official syllabus requirements.

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