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Ainat [17]
2 years ago
11

Give the atomic number, electron configuration and the number of valence electron if the following elements:

Biology
1 answer:
marishachu [46]2 years ago
5 0

Answer:

Atomic number: 13

Electron Configuration:[NE] 3s²3p¹

Valence electron: 3

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When the use of antihistamines result in dryness of the mouth, the nurse should recommend which to relieve the dryness? select a
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The nurse can follow these following tips:

For temporary relief of dryness of mouth from antihistamines:

1. the patient can chew on sugarless gums

2. the nurse can let the patient have bits of ice melt in their mouth

3. or the nurse can give a saliva substitute

If dryness of mouth does not go away after 2 weeks, seek doctor’s help.

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Why do you get thirsty after eating salty food osmosis.
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As the saltier blood circulates through the body, it makes the fluid outside of our body cells saltier than the fluid inside the cells. The cells notice the change right away. That's because the extra salt outside acts like a magnet, pulling water out of the cells.

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2 years ago
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Suppose a population is carrying a condition controlled by two alleles: R (dominant) and r (recessive). Only homozygous individu
White raven [17]

<span><u>The answer is A. 72.25 percent.</u>

The Hardy-Weinberg principle can be used:</span>

<em>p² + 2pq + q² = 1</em> and <em>p + q = 1</em>

where <em>p</em> and <em>q</em> are the frequencies of the alleles, and <em>p²</em>, <em>q²</em> and <em>2pq </em>are the frequencies of the genotypes.

<span>The <em>r</em> allele (<em>q</em>) is found in 15% of the population:
q = 15% = 15/100
Thus, q = </span><span>0.15

To calculate the <em>R</em> allele frequency (<em>p</em>), the formula p + q = 1 is used:
If p + q = 1, then p = 1 - q
p = 1 - 0.15
Thus, </span><span>p = 0.85

Knowing the frequency of the <em>R</em> allele (<em>p</em>), it is easy to determine the frequency of the RR genotype (p²):
p² = 0.85² = 0.7225

Expressed in percentage, p² = 72.25%.</span>

4 0
2 years ago
There is general agreement that species classified as Homo should share all of these characteristics EXCEPT
butalik [34]

Large brain size, small and flat face, small jaws and teeth, exploitation of diversity are some common features of <em>homo </em>species. <em>Different</em><em> </em><em>homo </em>species have different shapes of skulls.

Homo, genus of the family Hominidae (order Primates), is distinguished by a relatively large cranial capacity, limb structure adapted to a habitual erect posture and a bipedal gait, well-developed and fully opposable thumbs, hands capable of power and precision grips, and the ability to make standardized precision tools by combining one tool with another.

<em>Different </em><em>Homo </em>species are differentiate from skull shapes. Their body shapes also tends to vary. This is due to different environment conditions in different time zones.

However,<em> Homo</em> species show many common characteristics such as Large brain size, small and flat face, small jaws and teeth.

#SPJ1

To learn more about <em>Homo</em> species follow this link:

brainly.com/question/10169640?referrer=searchResults

4 0
1 year ago
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