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almond37 [142]
3 years ago
10

If one parent has sickle cell anemia and the other parent is a carrier, what is the possibility that their child will have sickl

e cell anemia
Chemistry
1 answer:
earnstyle [38]3 years ago
5 0
It’s a 50 50 chance unless one parent has a dominate gene
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Summarize the history of the periodic table
denis23 [38]

Periodic table is the representation of elements in an order

The history of periodic table can be summarized as

a) 1829 :  Johann Dobereiner proposed the triad rule. According to him we can classify the elements in a triad where the atomic mass of middle element is average of atomic mass of the near by two atoms.

For example : Li, Na and K is a triad. Where atomic mass of Na is average of atomic mass of K

atomic mass of Na = 7+ 39 / 2 = 23

However, with the further discovery of elements the law was rejected.

b) 1864  : John Newland proposed the law of octave. According to him we can arrange the elements in a set of seven elements where the property of second set of seven elements will resemble the properties of first of seven elements or property will be repeated after seven elements. This was also rejected due to its limited applicability.

c)  Meyer : He arranged some 28 elements into six different families based on their atomic masses. The members of each familiy shared some common properties.

d) 1869 : Mendleev :  He actually developed a periodic table based on atomic mass of elements. He arranged the elements into groups and periods. He even left space for some undiscovered elements, which were later on discovered.

e) 1916 : Henry Moseley : He finally arranged elements based on their atomic number based on X-ray studies. He proposed the modern periodic law that the periodic properties of elements are due to atomic number of elements.



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nadya68 [22]

Answer:

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Explanation:

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See the explanation below, please.

Explanation:

In the bunsen burner, the gas and air inlet can be regulated manually. In the case of metals (such as lithium and sodium in this case) they contain an electron in the latter in its external electronic configuration. They are characterized by transferring electrons easily and produce the emission of light when excited, producing flames of different colors in the lighter (orange for sodium and red / scarlet for lithium)

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Please help!!! (im really bad at chemistry)
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THE CORRECT ANSWER IS COMMAND.HOPE IT HELP YOU

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