Lab Reaction Rate : Variation of Temperature
Step 2: Measure the Reaction Rate at ≈ 20°C (Room Temperature)
Step 3: Measure the Reaction Rate at ≈ 40°C
Step 4: Repeat Step 2, heating the water to Measure the Reaction Rate at ≈ 65°C
Step 5: Measure the Reaction Rate at ≈ 5°C

Variation of Particle Size
Step 6: Measure the Reaction Rate for a Full Tablet
Step 7: Measure the Reaction Rate for a Partially Broken Tablet
Step 8: Measure the Reaction Rate for a Crushed Tablet

1 a

2 d

3 a

4 c

explanation:

the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.