PLEASE HELP MODULE SEVEN TEST QUESTION 11)Zach completed the following experiment to see what happens to differently charged objects when they come close to each other. Based on the observations that he collected, his teacher told him there is an error in his table. How can Zach correct his table? A positively charged dress and a negatively charged beach ball will attract each other, so Zach should change "repel" to "attract" for these objects. A negatively charged T-shirt and a positively charged chair will repel each other, so Zach should change "attract" to "repel" for these objects.
A negatively charged beach ball and a negatively charged T-shirt will attract each other, so Zach should change "repel" to "attract" for these objects.
A negatively charged glove and a positively charged dress will repel each other, so Zach should change "attract" to "repel" for these objects.

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.

b) nuclear ive learned that in a pedtrodic table