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3 years ago

Atomic number of f^-1

Chemistry

1 answer:

victus00 [196]3 years ago

7 0

The atomic number is 9 Ions have the same atomic number since atomic number signifies number of protons not electrons

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The edge length of the unit cell of KCl (NaCl-like structure, FCC) is 6.28 Å. Assuming anion-cation contact along the cell edge,

Mila [183]

Answer:

1.33 Å

Explanation:

Given that the edge length , a of the KCl which forms the FCC lattice = 6.28 Å

Also,

For the FCC lattice in which the anion-cation contact along the cell edge , the ratio of the radius of the cation to that of anion is 0.731.

Thus,

$\frac {r^+}{r^-}=0.731$ .................1

Also, the sum of the radius of the cation and the anion in FCC is equal to half of the edge length.

Thus,

$r^++r^-=\frac {a}{2}$ ...................2

Given that:

$Cl^-\ (r^-) = 1.82\ \dot{A}$

To find,

$K^+\ (r^+) = ? \dot{A}$

Using 1 and 2 , we get:

$1.731\ r^+=0.731\times \frac {6.28}{2}$

Size of the potassium ion = 1.33 Å

4 0

3 years ago

According to the VSEPR theory, which of the following factors determines the shape of a

Gala2k [10]

Answer:

B only

Explanation:

Using the VSEPR principle, the electron bond pairs and the lone pairs on the middle atom help us predict the structure of the molecule. The shape of a molecule is determined by the position of the nucleus and its electrons. The electrons and the nucleus settle in positions that minimize repulsion and maximize attraction.

4 0

2 years ago

A section of the periodic table is shown below: A portion of two rows of the periodic table is shown. The first row reads two he

cluponka [151]

The statement which is true is

Fluorine is more reactive than nitrogen because fluorine needs only one electron to fill its outermost shell.

Explanation

Fluorine has electron configuration of 1S²2S²2P⁵ while nitrogen has 1S²2S²2P³ electron configuration.

The 2P sub shell for nitrogen is half filled therefore it is sable than fluorine.

since p orbital can hold a maximum of 6 electrons ,Fluorine requires 1 electron to completely fill it's 2P sub shell which make it more reactive than nitrogen.

7 0

3 years ago

Determine the molar masses for each of the following elements, compounds, or molecules. Remember to round to the proper amount o

ra1l [238]

Answer:

Explanation:

Cu(OH)2 _97.65 g/mol

Na2WO4 _293.82 g/mol

Pd _106.42 g/mol

KMnO4 _158.03 g/mol

NH3 _17.03 g/mol

3 0

2 years ago

Read 2 more answers

Write the balanced nuclear equation for β− decay of silicon−32. Include both the mass numbers and the atomic numbers with each n

weqwewe [10]

Answer:

$^{32}_{14}Si\rightarrow ^{32}_{15}P+e^-+\bar{v}_e$

Explanation:

Beta decay conserves the lepton number. In $\beta^-$ decay, the atomic number of the element increases which is accompanied by the release of an electron antineutrino, $e^-+\bar{v}_e$ .

For example:-

$^A_ZX\rightarrow ^A_{Z+1}X+e^-+\bar{v}_e$

The $\beta^-$ decay of silicon-32 is shown below as:-

$^{32}_{14}Si\rightarrow ^{32}_{15}P+e^-+\bar{v}_e$

8 0

3 years ago