Question

A. Isotopes:

List all of the isotope (using symbols) for all isotopes found in nature.

B. Atomic Size - 2.32 g/cm3

How many atoms of your Si (Silicon) must be lined up to to make a line 1 inch long?

C. Density

17. What would the mass of 1 Liter (1000 mL or 1000 cm³) of Si (silicon) be?  

Answer 1

Following is the - complete Answer -&- Explanation: for the given Question, in....Typed format...

Answer(s):

1. Part - A: There are five ( 5 ) separate isotopes, of silicon, having the following symbols: ²⁸Si₁₄ ; ²⁹Si₁₄ ; ³⁰Si₁₄ ; ³¹Si₁₄ ;  ³²Si₁₄.....
2. Part - B: 2.54 atoms of silicon are to be lined up to cover a length of 1.0 inch ( considering length of each atom, as = 1.0 cm. )
3. Part - C: mass of silicon contained in 1 cm³, of silicon will be =  2.32 g ( grams )
4. Question - 17: Mass of 1.0 L or 1000 cm³, of silicon, will be = 2.32 kg( kilograms)

​​​​​​​Explanation:

Following is the complete Explanation, for the above Answer(s), in...Typed format...

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Part - A:

As we know, following are the symbols, of the isotpopes, of silicon:

1. ²⁸Si₁₄
2. ²⁹Si₁₄
3. ³⁰Si₁₄
4. ³¹Si₁₄
5. ³²Si₁₄​​​​​​​

Where:

• the Superscripts denote: the atomic weights, of  Silicon...atoms..
• the Superscripts denote:  the atomic number, of the silicon....atoms.

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Part - B:

• Given:

1. ​​​​​​​Atomic Size of silicon atoms: = 2.32 g/ cm³

• ​​​​​​​Step - 1:

​​​​​​​Assuming , each atom, of silicon, to be shaped like a cube, we can consider, the length of each atom of silicon, to be equal to :  l_atom = 1.0 cm

Therefore, length , of each atom =  1.0 cm....

  1.0 inch = 2.54 cm

  Number of atoms of silicon, to be lined up to cover / make a line of length = 1.0 inch , will be equal to the following:

Number of silicon atoms = ( 1.0 inch ) / ( l_atom ) = ( 2.54 cm ) / ( 1.0 cm ) = 2.54 atoms of silicon, are to be lined up .

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Part - ( C ):

As, it is given in the question: mass of silicon contained in 1 cm³, of silicon will be =  2.32 g ( grams )

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Question - 17:

Using the value of the above: Density of silicon, we would get, the following:

Mass of 1.0 L or 1000 cm³, of silicon, will be = ( 1000.0 cm³ ) x ( 2.32 g/ cm³ ) = 2320.0 grams =  2.32 kg( kilograms)

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