Arrangement of ElementsCambridge IGCSE Chemistry: Flashcards
Card 1 of 100 of 10 known
Question
How are elements arranged in the periodic table?
Tap or press Space to reveal
Tap card or press Space to flip
See all 10 cards
- How are elements arranged in the periodic table?
- In order of increasing proton (atomic) number, organised into periods (rows) and groups (columns).
- What do elements in the same group have in common?
- The same number of electrons in their outer shell.
- What do elements in the same period have in common?
- The same number of occupied electron shells.
- How does character change across a period, left to right?
- It changes from metallic character (left) to non-metallic character (right).
- What charge of ion do Group I elements typically form?
- 1+ (they lose 1 electron).
- What charge of ion do Group VII elements typically form?
- 1− (they gain 1 electron).
- What charge of ion do Group VI elements typically form?
- 2− (they gain 2 electrons).
- Why do elements in the same group have similar chemical properties?
- Because they have the same number of outer shell electrons, and chemical reactions mainly involve outer shell electrons.
- How can the periodic table be used to predict an element's properties?
- By using its position (group and period) to compare it with known trends shown by other elements in the same group or period.
- What is the relationship between group number and number of outer shell electrons (Groups I–VII)?
- Group number equals the number of outer shell electrons.