Match each atomic number to its element.
1. Which element has the atomic number 10?
- Neon
- Helium
- Gold
- Silver
Atomic number 10 belongs to Neon (symbol Ne). An element's atomic number equals the number of protons in its nucleus.
2. Which element has the atomic number 18?
- Argon
- Iron
- Magnesium
- Phosphorus
Atomic number 18 belongs to Argon (symbol Ar). An element's atomic number equals the number of protons in its nucleus.
3. Which element has the atomic number 22?
- Nickel
- Titanium
- Phosphorus
- Helium
Atomic number 22 belongs to Titanium (symbol Ti). An element's atomic number equals the number of protons in its nucleus.
4. Which element has the atomic number 25?
- Cobalt
- Neon
- Manganese
- Zinc
Atomic number 25 belongs to Manganese (symbol Mn). An element's atomic number equals the number of protons in its nucleus.
5. Which element has the atomic number 27?
- Cobalt
- Iodine
- Copper
- Chlorine
Atomic number 27 belongs to Cobalt (symbol Co). An element's atomic number equals the number of protons in its nucleus.
6. Which element has the atomic number 28?
- Iron
- Nickel
- Nitrogen
- Iodine
Atomic number 28 belongs to Nickel (symbol Ni). An element's atomic number equals the number of protons in its nucleus.
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