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skelet666 [1.2K]

3 years ago

12

Which of the following elements is the most reactive? A. Arsenic (As) B. Sulfur (S) C. Fluorine (F) D. Carbon (C

)

2 answers:

Simora [160]3 years ago

7 0

Im not that smart but i think it c

adell [148]3 years ago

4 0

I think its a but i could be wrong

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C,

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Is a solid because liquids are not is not that close and gas is very far apart.

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2 years ago

The frequency of an x-ray wave is 3.0 x 1012MHz. Its wave speed is 3.0x 108m/s. Calculate the wavelength of the x-ray wave below

jasenka [17]

Answer: The wavelength of the x-ray wave is $10^{-10}m$

Explanation:

To calculate the wavelength of light, we use the equation:

$\lambda=\frac{c}{\nu}$

where,

$\lambda$ = wavelength of the light = ?

c = speed of x-ray= $3.0\times 10^8m/s$

$\nu$ = frequency of x-ray = $3.0\times 10^{12}MHz=3.0\times 10^{18}Hz= 3.0\times 10^{18}s^{-1}$ $(1Hz=1s^{-1})$

Putting in the values:

$\lambda=\frac{3.0\times 10^8m/s}{3.0\times 10^{18}s^{-1}}=10^{-10}m$

Thus the wavelength of the x-ray wave is $10^{-10}m$

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3 years ago

Describe the structure of atoms including the masses, electrical, charges, and locations of protons, neutrons in the nucleus ,an

steposvetlana [31]

Answer:

The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge).

Explanation:

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