Formula for Xenon hexafluoride is XeF6
Based on the periodic table, the element mendeleev called eka-manganese is now called technetium. Technetium<span> is a silvery-gray metal that tarnishes slowly in moist air. Hope this answers the question. Have a nice day. Feel free to ask more questions.</span>
Answer:
B
Explanation:
I looked it up and found the answer lol
Answer: read your book
Explanation: if you read it should be in there
First choice: PhH4 has a lower boiling point
Second: SiF4 higher
Third: CBr4 higher