argon
neon
xenon
hydrogen
Answer is Right!
Answer is Wrong!
The answer is D. Hydrogen.
Argon, neon, and xenon are all noble gases. Noble gases are elements that have a full valence shell, which means that they are very stable and do not react easily with other elements. Hydrogen, on the other hand, is a non-metal that has a single electron in its valence shell. This makes it very reactive and prone to bonding with other elements.
Here is a more detailed explanation of each option:
- Argon is a noble gas with the symbol Ar and atomic number 18. It is a colorless, odorless, and tasteless gas that is found in the Earth’s atmosphere. Argon is used in a variety of applications, including lighting, welding, and cryogenics.
- Neon is a noble gas with the symbol Ne and atomic number 10. It is a colorless, odorless, and tasteless gas that is found in the Earth’s atmosphere. Neon is used in a variety of applications, including lighting, signs, and lasers.
- Xenon is a noble gas with the symbol Xe and atomic number 54. It is a colorless, odorless, and tasteless gas that is found in the Earth’s atmosphere. Xenon is used in a variety of applications, including lighting, lasers, and medical imaging.
- Hydrogen is a non-metal with the symbol H and atomic number 1. It is the lightest element in the universe and is found in water, acids, and organic compounds. Hydrogen is used in a variety of applications, including fuel cells, rocket engines, and nuclear fusion.