Answer:
Astatine and chlorine are halogens only
Nitrogen and sulphur are non metals only
Krypton (Kr) is noble gas only
Answer:
Due to gravity and volatile matter.
Explanation:
- As the rocky matter is refractory as it forms in the relatively high and warm and the presence of the gravity also plays a crucial role in the formation of the rocky masses.
- The volatile matter solidifies at a cold temperature and such as those in the outer parts of the nebula and thus gas giant is cold and icy plants as they form away from the sun and have distinct gravitational compositions.
