the _ will identify how many valence electrons for an atom. *\nperiod number\ngroup number\natomic…

the _ will identify how many valence electrons for an atom. *\nperiod number\ngroup number\natomic number\nmass number\n\nhow many electrons will rubidium need to gain or lose to be left with a full outer shell of valence electrons? * 2 points\nrb\nlose 1\ngain 2\nlose 3\ngain 4\nlose 5\ngain 6\nlose 7\ngain 8

the _ will identify how many valence electrons for an atom. *\nperiod number\ngroup number\natomic number\nmass number\n\nhow many electrons will rubidium need to gain or lose to be left with a full outer shell of valence electrons? * 2 points\nrb\nlose 1\ngain 2\nlose 3\ngain 4\nlose 5\ngain 6\nlose 7\ngain 8

Answer

Brief Explanations:

  1. The group number of an element in the periodic - table indicates the number of valence electrons for main - group elements. For example, elements in group 1 have 1 valence electron, elements in group 2 have 2 valence electrons, etc.
  2. Rubidium (Rb) is an alkali metal in group 1 of the periodic table. It has 1 valence electron. To achieve a full outer shell (noble - gas configuration), it will lose 1 electron.

Answer:

  1. B. group number
  2. A. lose 1