shahida17101985
shahida17101985 shahida17101985
  • 03-03-2021
  • Biology
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please tell me answers I am given you brainliest ​

please tell me answers I am given you brainliest class=

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16romanovaa45 16romanovaa45
  • 03-03-2021

Answer:

Q2->They all form acids when combined with hydrogen. They are all fairly toxic. They readily combine with metals to form salts.

Q3->Because their outermost orbit is complete.  In Mendeleev's original periodic table there was no place reserved for noble gas.  They were discovered in end of 19th century.  So Mendeleev created zero group without disturbing original periodic table.

Explanation:

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