VIIIA (NOBLE GASES)

The elements in group VIIA are active

• True

• False

Answer explanation

in the because on the basis of their atomic structure, Helium(2e) and the rest have (8e) in the outermost shell.

Helium come from the name of an ancient greek god "Hephaestus"

• true

• false

Answer explanation

the name of the ancient greek god is helios

It was first discovered by  scientists as a bright yellow line in the spectrum  of the chromosphere of the sun.

• true

• false

Helium is used as an alternative for nitrogen in gas tanks and alternative for Hydrogen in balloons

• true

• false

Helium is a component of artificial gas

• true

• false

Krypton is the least abundant noble gas

• true

• false

Argon: It is the most abundant noble gas. It is a byproduct of the fractionation of liquid air

• true

• false

Neon: other lights are referred to as neon lights

• true

• false

Xenon was discovered by Frank Ramsey

• true

• false

Answer explanation

Xenon was founded by William Ramsay

Radon is used to cure certain types of cancer. Sealed tubes containing the gas are embedded in tissues to be treated. Both radium and radon emit alpha particles in the first stage of their radioactive decay.

• true

• false