Element Element
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18) Element Rand Element Q have the same number of valence electrons. These elements both have similar chemical behavior, but Element Rhas fewer energy levels than Element
Which statement best describes the positions of the two elements in the periodic table?
A) The two elements are in the same period, with Element R the first element in the period and
Element Q the last element.
B) The two elements are side by side in the same period, with Element Q to the left of Element R.
C) The two elements are in the same group, with Element R just above Element Q
D) The two elements are in the same group, with Element Q at the top of the group and Element Rat the bottom
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practical process described pest part of scientific investigation.

because practical knowledge is powerful then therotical knowledge.

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.

yes

ya te ayud espera

you need to have a picture of the atom that way we can answer it