Sherpa

Existing user?

Combined Science: Chemistry

GCSE · Edexcel · foundation

QuestionsFlashcards

Obtaining & Using Metals
Reversible Reactions & Equilibria
- Reversible Reactions & Equilibrium
  3
- The Haber Process
  4

Group 1
- Group 1 (Alkali Metals)
  4
- Group 1: Reactivity & Electronic Configurations
  4
Group 7
Group 0

Ions Flashcards

All 5 cards in this deck

What is an ion?: An atom or group of atoms with a positive or negative charge.
What are the names for a positively charged ion and a negatively charged ion?: Positive ion = cation; negative ion = anion.
What charge does an ion of an element in group 1, 2, 6 or 7 have?: Group 1: $+$ , group 2: $2+$ , group 6: $2-$ , group 7: $-$ .
How do you find the number of electrons in a simple ion?: Positive ion: electrons = atomic number − size of the charge.
Negative ion: electrons = atomic number + size of the charge.
Why do atoms of elements in groups 1, 2, 6 and 7 lose or gain electrons to form ions?: To get a full outer shell of electrons: a stable electronic configuration, like that of a noble gas.