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Fynjy0 [20]
3 years ago
11

Scientists Hydia, Christian, and Trynatie took 100 frogs. They kept 50 of the frogs at 35 degrees C. They kept 50 of the frogs a

t 25 degrees C. Then they measured how fast each frog's heart beat. What was changed or different BEFORE the experiment began?
Chemistry
1 answer:
Usimov [2.4K]3 years ago
4 0

Answer: Temperature was kept as an independent variable to observe the changes in the heart beat.

Explanation:

Independent variable can be defined as the variable which can be changed to induce change in an dependent variable which is the outcome of the experiment.

According to the given situation, the temperature in which the frogs were kept changed to observe the changes in the rate of heart functioning. So, the   temperature is the independent variable which changed before the experiment began.

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In this case, according to the organization of the periodic table, we can see that from left to right, the electronegativity increases as nonmetals are able to attract electrons more easily than metals.

Moreover, in contrast to the previous periodic trend, the metallic character decreases from left to right because the elements tend to decrease the capacity to lose electrons and consequently start attracting them.

Thus, the answer would be: "Metallic character decreases, and electronegativity increases".

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