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which element has the largest atomic radius?

answers options are in the photo

Ba.

Explanation:

Atomic radius decreases across the period and increases across the group.

Atomic radius of Be = 153 pm.

Atomic radius of F = 147 pm.

Atomic radius of Ga = 187 pm.

Atomic radius of Ba = 268 pm.

∴ The element that has the largest atomic radius is Ba.

beta decay is the answer

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.