outer shell of electrons in electron cloudouter shell is the only part of the atom that can interact with atoms next door to it (reactivity)only group A electronsto find _______________: count number of elements on same period until you reach the element (include element in your counting)

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1.
outer shell of electrons in electron cloud
outer shell is the only part of the atom that can interact with atoms next door to it (reactivity)
only group A electrons
to find _______________: count number of elements on same period until you reach the element (include element in your counting)