Elements are organized on the periodic table based on their properties. Which statement correctly predicts and explains the chem
ical reactivity of two different metals? Barium (Ba) is less reactive than calcium (Ca) because the valence electrons in calcium atoms are farther from the nuclei and harder to remove. Strontium (Sr) is more reactive than magnesium (Mg) because the valence electrons in strontium atoms are farther from the nuclei and harder to remove. Rubidium (Rb) is more reactive than sodium (Na) because the valence electrons in sodium atoms are closer to the nuclei and easier to remove. Lithium (Li) is less reactive than potassium (K) because the valence electrons in lithium atoms are closer to the nuclei and harder to remove. plz answer asap
Julian should use the ordinary wooden ramp and wooden block as the control . A control group is usually not priority of the experiment. It is used to understand an experiment better.
The control in this experiment can be just the ordinary wooden ramp and the blocks.
He should time the rate at which the blocks slides down the ramp.
This will be a perfect control in the experiment and it can give information about how the blocks will fare ordinarily without any lubricant.
