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Tom [10]
3 years ago
10

Definition for valence electrons science.

Biology
1 answer:
KATRIN_1 [288]3 years ago
5 0

Explanation:

valence electron, any of the fundamental negatively charged particles in the outermost region of atoms that enters into the formation of chemical bonds. Whatever the type of chemical bond (ionic, covalent, metallic) between atoms, changes in the atomic structure are restricted to the outermost, or valence, electrons.

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nitrogen gas reacts with hydrogen gas to form ammonia.what are the reactants in this chemical reactions
Lera25 [3.4K]

The formula for this reaction would be

N + H3 ---> NH3

The first part of the reaction are the reactants and the second part is the product.

The reactants of this reaction are N and H3.

Or you could say the reactants are nitrogen and hydrogen

6 0
4 years ago
Think about how sedimentary rocks form. Can you determine which fossils in the image are the oldest and which fossils are the yo
seropon [69]

You failed to include the picture that goes with the question.  However, the oldest fossils will be the fossils in the oldest layer, which is the lowest layer of sediment.  Sedimentary rock forms as mud and silt pile up over thousands and millions of years.  The layers of sediment harden and become rock.  Organisms that are trapped in those layers become fossils as additional layers pile on top of them, forming new layers of sediment.

5 0
3 years ago
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In a study of genetic variation of the Graceland gene, a researcher finds that there are two alleles in a population. In a large
Licemer1 [7]

Answer:

Option 1, No. The highest frequency of heterozygotes under Hardy-Weinberg equilibrium is 0.5

Explanation:

As per Hardy Weinberg’s equilibrium principle, the maximum frequency of heterozytotic individuals occur only when half of the population is dominant and recessive homozygous.  

In other way when the sum of frequency of dominant and recessive species is equal to 0.5, only then the frequency of heterozygotes is maximum which in any case would not be higher than 0.5.  

Hence, option 1 is correct

7 0
4 years ago
A complete blood count is commonly performed before a client goes into surgery. What does this test seek to identify?
Bumek [7]

Answer:

A complete blood count (CBC) or full blood count (FBC) is a hematological laboratory investigation which comprises of the following tests:

1. White blood cell count which includes both total count and differential count. It gives a pointer to the immunity level of the patient.

2. Platelet count- this shows the bleeding tendencies.

3. Packed cell volume(PCV) or hematocrit level: This shows the red blood cell fraction in the blood. If low, patient would possibly need a transfusion or would build with hematinics before the surgery.

4. Mean corpuscular volume (MCV)

5. Mean corpuscular hemoglobin(MCH)

6. Mean corpuscular hemoglobin concentration(MCHC)

4 0
3 years ago
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Significance of secondary tissues in plants
IRINA_888 [86]

Answer: Secondary growth is the outward growth of the plant, making it thicker and wider. Secondary growth is important to woody plants because they grow much taller than other plants and need more support in their stems and roots. Lateral trimester are the dividing cells in secondary growth, and produce secondary tissues.

Explanation:

6 0
3 years ago
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