How are the physical and chemical properties of atoms represented on the periodic table of elements

1 answer:

8 0

Chemical properties of each elemt are determined by the elemts electroic configuration, and particulary by its outermost valence electrons. In addition, the total number of electron shells an atom determines which period it belongs to

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Which element is smaller is atomic size?

Ganezh [65]

Answer:

Scandium is the smallest element of the four

Explanation:

Vanadium = 50.9415 u

Titanium = 47.867 u

Scandium = 44.955912 u

Chromium = 51.9961 u

3 0

3 years ago

My Everest is the highest mountain on earth.its height is 8.848 km. Convert this height to feet. Write your answer in standard n

Vinvika [58]

Answer: $2.9(10)^{7} ft$

Explanation:

Firstly we need to know that $1 km=3280.84 ft$ , then we cam make the conversion:

$8848 km \frac{3280.84 ft}{1 km}=29,028,872.32 ft$ This is the height of Mount Everest in feet

However, we can express it using scientific notation by counting to the left the decimal spaces:

$29,028,872.32 ft \approx 2.9(10)^{7} ft$

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3 years ago

Ampicillin is a bacteriostatic antibiotic. (Instead of killing bacteria, it inhibits their growth.) Ramon plated bacteria transf

love history [14]

Answer:

A) That resistance in bacteria is produced due to inactivation of ampicillin by the beta lactamase enzyme. This enzyme is expressed by the bla gene found in the plasmid. This enzyme is secreted into the culture medium, thereby inactivating ampicillin. Thanks to this inactivation, the bacteria colonies will be able to develop. After a day of incubation, only those bacteria that took the plasmid that gives them resistance to ampicillin will grow after transformation. After prolonged incubation, two types of colonies can be observed in the culture medium. One large colony with ampicillin resistance, and another small colony, both of which are sensitive to ampicillin.

B) Large colonies are characterized by being resistant to ampicillin. When Ramón isolates the plasmid, he will have the gene that provides resistance to antibiotics. Said plasmid can be used again on those bacteria that are sensitive to ampicillin.

On the other hand, satellite colonies are sensitive to ampicillin. These types of colonies do not have the plasmid that contains the gene that gives ampicillin resistance. It is not possible to isolate any plasmids from these satellite colonies. These satellite bacteria will not be able to grow if they are transferred to a plate containing fresh ampicillin, while large colonies, which possess the plasmid that gives them resistance to ampicillin, will be able to grow on that plate.

Explanation:

3 0

3 years ago

Calculate the eccentricity of an ellipse. The distance between the foci is 5.2 and the length of the major axis is 20.6.Round of

Dominik [7]

Answer:

The eccentricity of the ellipse is 0.252.

Explanation:

The eccentricity of an ellipse ( $c$ ), dimensionless, can be determined by means of the following expression: