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gizmo_the_mogwai [7]
3 years ago
14

Write periodic properties decrease in group​

Chemistry
1 answer:
arsen [322]3 years ago
7 0

Answer:

Generally, the atomic radius decreases across a period from left to right and increases down a given group. ... This causes the atomic radius to decrease. Moving down a group in the periodic table, the number of electrons and filled electron shells increases, but the number of valence electrons remains the same.

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In which orbitals would the valence electrons for carbon (C) be placed? s orbital and d orbitals s orbital only p orbitals only
lutik1710 [3]

Answer:

p orbitals only

Explanation:

Carbon has an atomic number of 6 so its electron configuration will be 1s² 2s² 2p². It has two orbitals as indicated with the 2 as its period number with the outer orbital have 4 valence electrons. So carbon is in the p-orbital, period 2 and in group 4.

7 0
3 years ago
Read 2 more answers
Electrochemistry - Equilibrium
Ipatiy [6.2K]

Answer:

Explanation:

The relation between equilibrium constant and Ecell is given below .

E⁰cell = (RT / nF ) lnK  , F is faraday constant T is 273 + 25 = 298 K

E⁰cell  =  1.46 - 1.21 = .25 V

n = 2

Putting the values

.25 = (8.314 x 298  lnK) / (2 x 96485 )

lnK = 19.47

K = 2.85 x 10⁸

2 )

Change in free energy Δ G

Δ G ⁰ = nE⁰ F

n = 4

E⁰ = .4 + .83 = 1.23 V

Δ G ⁰= 4 x 1.23 x 96485

= 474706 J / mol

3 )

E⁰cell = (RT / nF ) lnK

n = 2

1.78 = 8.314 x 298  lnK / 2 x 96485

lnK = 138.638

K = 1.62 x 10⁶⁰

8 0
3 years ago
To make a saturated solution, 30 g of sodium chloride is dissolved in 100 g of
lara31 [8.8K]

Answer:

30%

Explanation:

As the formula for finding concentration

= (mass of solute/mass of solution)×100

= (30/100)×100

= 0.3×100

= 30%

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The voltage delivered by a primary battery is: _____________
otez555 [7]

Answer:

The voltage delivered by a primary battery is unrelated to its size.

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I can explain how transferring kinetic energy in and out of a substance can cause a change

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