To determine which elements have the same number of valence electrons, we need to know the number of valence electrons for each element listed in the table.
1. Barium (Atomic Number 56):
- Barium is found in Group 2 of the periodic table.
- Elements in Group 2 have 2 valence electrons.
2. Neon (Atomic Number 10):
- Neon is found in Group 18 of the periodic table.
- Elements in Group 18, which are noble gases, have a complete set of valence electrons, totaling 8 valence electrons.
3. Silicon (Atomic Number 14):
- Silicon is found in Group 14 of the periodic table.
- Elements in Group 14 have 4 valence electrons.
4. Carbon (Atomic Number 6):
- Carbon is also found in Group 14 of the periodic table.
- Elements in Group 14 have 4 valence electrons.
Upon evaluating these valence electron configurations, we find:
- Barium has 2 valence electrons.
- Neon has 8 valence electrons.
- Silicon has 4 valence electrons.
- Carbon has 4 valence electrons.
From this analysis, both Silicon and Carbon have the same number of valence electrons, which is 4.
Thus, the correct pair of elements that have the same number of valence electrons are Silicon and Carbon.
So, we select the boxes for Silicon and Carbon.
