Respuesta :
Answer:
2. Reactivity increases from left to right across the periodic table.
Explanation:
Period - reactivity decreases as you go from left to right.
Period - reactivity increases as you go from the left to the right.
Group - reactivity decreases as you go down the group.
Answer:The answer would be 4 because when they move left to right across the periodic table it increases.
Explanation: