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soldi70 [24.7K]
3 years ago
11

Sodium (Na) and potassium (K) are in the same group in the periodic table. Sodium is in the 11th position. How many valence elec

trons does potassium have?
Biology
2 answers:
yKpoI14uk [10]3 years ago
3 0
One valence electron
anygoal [31]3 years ago
3 0
All elements in group one have one valence electrons, so potassium and sodium would both have one valence electron. this trend is continued into group 2, group 13, group 14, and so on.
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En los seres vivos acuaticos el oxigeno es tomado del __________ y penetra a la celula por el fenomeno de ___________
andrezito [222]

Answer:

En los seres vivos acuáticos el oxigeno es tomado del <u><em>agua</em></u> y penetra a la célula por el fenómeno de <em><u>respiración branquial.</u></em>

Explanation:

La respiración es el proceso mediante el cual los seres vivos obtienen oxígeno.  Es decir, la respiración implica el reemplazo del dióxido de carbono en los pulmones por oxígeno del aire, y puede ser pulmonar, branquial, traqueal o cutánea.

La respiración branquial es un tipo de respiración propia de la mayoría de los animales acuáticos y se lleva a cabo en las branquias, unas estructuras con forma de láminas que contienen vasos sanguíneos. Los animales acuáticos dispone de estos órganos que permiten absorber el oxígeno que se encuentra en el agua y eliminar el dióxido de carbono.

El agua que entra por la boca y circula por las branquias, donde el oxígeno es absorbido, pasa a la sangre y es transportado a todo el cuerpo donde se produce una respiración celular.

Es decir, <em><u>en los seres vivos acuáticos el oxigeno es tomado del agua y penetra a la célula por el fenómeno de respiración branquial.</u></em>

5 0
3 years ago
Chloe’s mother wants to have another child. However, she is concerned that a second child might also have CF, so she encourages
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5 0
4 years ago
Which best describes oogenesis?
pashok25 [27]
<span>The process of creating egg cells.</span>
5 0
3 years ago
A) a moth has two alleles for spots. it can have brown or white spots. the brown spot allele frequency is 0.26. what is the whit
Rufina [12.5K]

<span>The answer is 0.74.</span>

This is derived using the Hardy Weinburg principle of allelic frequency at equilibrium.

p + q = 1

Therefore if q = 0.26; then 1- 0.26  = 0.74

<span>In most occasions, the allele with the higher frequency is usually the dominant one (but not always). </span>






4 0
4 years ago
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