Question

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Answer 1

Explanation:

Helium is commercially recovered from natural gas deposits, mostly from Texas, Oklahoma and Kansas. Helium gas is used to inflate blimps, scientific balloons and party balloons. It is used as an inert shield for arc welding, to pressurize the fuel tanks of liquid fueled rockets and in supersonic windtunnels.

Uses: Neon is used glow lamps, electron tubes, signs, plasma studies, fluorescent starter tubes, cryogenic refrigeration and gas lasers. Neon is a colorless, odorless, and tasteless monatomic gas, belonging to the Group VIIIA elements, called noble gases.

Helium has two valence electrons, the other noble gases have eight. Rare Gases Applications and Uses for Neon (Ne), Krypton (Kr) and Xenon (Xe):

Answer 2

Answer:

1

1=c

2= d

3 =b

4= a

is the answer