Chemistry, 31.03.2021 01:00 kay7060

The diagrams show life cycles of two organisms that live near a freshwater ecosystem. Mosquito Life Cycle
Frog Life Cycle
Adult
Adult
Froglet
Eggs
Adult
emerges
Eggs
WHE
(laid on water)
(laid on water)
Developing
tadpole
Tadpoles
Pupa
Larva
Which environmental change will most likely have a negative effect on reproduction in both organisms?
A: several years of drought. B: A winter with higher then normal temperatures. C: An increase in summer storms D: several years with above-average precipitation

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Answer from: Quest

it is a good conductor

explanation:

Answer from: Quest

assuming that your periodic table has eighteen columns, you should highlight the four elements in the third column from the left of the table.

explanation

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the $3d$ have energy higher than those in the $4 s$ orbital while lower than those of the $4 p$ orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the $4s$ orbital is therefore filled right after $3p$ orbitals and before $3 d$ orbitals.

potassium has electron configuration $[\text{ar}] 4 s^{1}$ and calcium $[\text{ar}] 4 s^{2}$ . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration $[\text{ar}] 4 s^{2} \; 3d^{1}$ and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the $ns^{2} \; (n-1) p^{1}$ and should be highlighted as well.

Answer from: Quest

it forms an anion that has a larger radius. anions have a negative charge and are larger than the original atom.

Answer from: Quest

You would be correct, boiling water does disinfect contamination. the property of disinfecting means to kill germs, bacteria and other pathogens or contamination that might cause an infection or cause a person to become sickly. a couple methods of disinfecting are using soap, other cleaning supplies or by simply "boiling" the contaminate. the reason why boiling water disinfects certain attributes is because some cells cannot survive the heat and pressure.

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The diagrams show life cycles of two organisms that live near a freshwater ecosystem. Mosquito Life...