Fluorine-18 undergoes positron emission as shown: 18 F → 4X+ IB Enter the appropriate values for A and Z and the chemical symbol for X ​

"hydrogen bonding is the attraction of h atoms in the water molecule (slight + charge) to o atoms in a neighboring water molecule (slight - charge); it is a weak interatomic force. but it is still strong enough to the water molecules "stick" together."

geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.

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