How many protons?
The atomic number of an element is the number of protons in its nucleus, and its place in the periodic table. The wheel shows an element; each spin asks for its number. Press SPIN!:
Your score
Score, In a row and Best run are kept beside the wheel. Start again puts the score back to zero:
Row by row
The first twenty – hydrogen to calcium – are on the wheel when it opens, which is what most school courses ask for. Add the next rows of the table when they are easy:
The wrong answers are numbers from the same part of the table, so they are close. Change that under Quiz settings:
Worth knowing by heart
- 1 hydrogen, 2 helium, 6 carbon, 7 nitrogen, 8 oxygen.
- 11 sodium and 17 chlorine: table salt.
- 26 iron, 29 copper, 47 silver, 79 gold.
- 92 uranium – the last element found in nature in any amount.
How to learn them
- Start with one group.
- Open Options and tick Take the ones I got right off the wheel.
- Spin until the wheel is empty – what is left at the end is what you do not know yet.
- Then try the chemical symbols quiz.