How to Learn the Flame Test Colours
Heating a metal compound in a flame produces a characteristic colour — a quick chemistry test to identify which metal ion is present. Sodium glows yellow, copper green, potassium lilac. This deck teaches the colours you need for the lab and the exam.
There are 11 cards in the deck below. You can read through them, practise them right here with the flip-card player, and then save the deck to study properly with spaced repetition — the method that makes them stick for months, not minutes.
Why the flame test colours is hard to memorize (and the fix)
Several are easy to swap (potassium lilac vs lithium red vs strontium crimson), and the reds all look similar. Anchoring each metal to its exact colour is the only way.
The fix is active recall plus spaced repetition. Instead of re-reading the list (which feels productive but barely works), you test yourself — pull each answer out of memory — and you review each card on a schedule that stretches over time. Every time you successfully recall a fact, the memory gets stronger and the next review is pushed further out. That's how you go from "I saw it once" to "I just know it."
The fastest way to learn the flame test colours
- Break it into small batches. Learn the distinct ones first (sodium yellow, copper green, potassium lilac), then the family of reds (lithium, calcium, strontium).
- Test, don't re-read. Look at the question, say the answer out loud before flipping the card. The little struggle to recall is what builds the memory — a smooth re-read does almost nothing.
- Review on a schedule. Spaced repetition shows you each card right before you'd forget it. Get one right and it comes back in a few days, then a week, then a month. Miss one and it comes back sooner.
- Keep sessions short and daily. Five to ten minutes a day beats a two-hour cram every time. Consistency is the whole game.
One fact per card. Sodium's strong yellow can mask other colours — a classic exam warning.
The full deck: the Flame Test Colours
Here's every card in the set. Practise them above, or save the deck and let spaced repetition schedule your reviews automatically.
| Metal ion | Flame colour |
|---|---|
| What flame colour does lithium give? | Crimson / red |
| What flame colour does sodium give? | Yellow / orange |
| What flame colour does potassium give? | Lilac / purple |
| What flame colour does calcium give? | Orange-red (brick red) |
| What flame colour does copper give? | Green / blue-green |
| What flame colour does barium give? | Pale (apple) green |
| What flame colour does strontium give? | Bright red / crimson |
| Which metal gives a yellow flame? | Sodium |
| Which metal gives a green flame? | Copper (or barium — paler green) |
| Why can sodium be a problem in flame tests? | Its strong yellow can mask other colours |
| What is a flame test used for? | To identify the metal ion in a compound |
Save this deck and actually remember it
Create a free account, keep this 11-card deck, and we'll schedule every review at the perfect moment. First deck free forever — no credit card.
Study this deck free →FAQ: learning the flame test colours
How long does it take to learn the flame test colours?
Most people can lock in the flame test colours within one to three weeks of short daily sessions. With spaced repetition doing 10–11 cards a day, you'll recognise them within days and recall them reliably within a couple of weeks.
What's the best way to memorize the flame test colours?
Active recall plus spaced repetition. Test yourself instead of re-reading, and review on a schedule that spaces the cards out over time. Flashcards are built for exactly this — which is why the deck above is the fastest path.
Is this deck free?
Yes. You can practise all 11 cards on this page for free with no account. Sign up (also free) to save the deck and let spaced repetition schedule your reviews so it sticks long-term.