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3 years ago

How does the atomic radius change going down and across the periodic table?

2 answers:

8 0

Atomic radius increases as you move down and across to the left of the periodic table towards Francium. Atomic radius decrease going up and across to the right of the periodic table towards Fluorine.

spin [16.1K]3 years ago

4 0

Answer:

In general, atomic radius decreases across a period and increases down a group. Across a period, effective nuclear charge increases as electron shielding remains constant.

Explanation:

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A cell is sitting in a solution containing 100 mM NaCl, and 30 mM Glucose. The inside of the cell contains 90 mM KCl and 30 mM C

kirza4 [7]

Answer

(a)

Extracellular= 0.230 osmols

Intracellular=0.270 osmols

(b)

As concentration of intracellular fluid is higher than extracellular fluid,solvent enters into the cell until the concentration inside and outside are Equal during this,the cell will become swallow.

Check attachment for calculation

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3 years ago

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Anarel [89]

Answer:

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3 years ago

insert the missing coefficients in the following partially balanced chemical equations S+6HNO=HSO4+NO+H2O

lianna [129]

Answer:

S + 6HNO₃ ⟶ H₂SO₄ + 6NO₂ + 2H₂O

Step-by-step explanation:

S + 6HNO₃ ⟶ H₂SO₄ + NO₂ + H₂O

One way is to balance this equation is the oxidation number method.

Step 1. Calculate the oxidation number of every atom:

S⁰ + H⁺¹N⁺⁵O₃⁻² ⟶ H₂⁺¹S⁺⁶O₄⁻² + N⁺⁴O₂⁻² + H₂⁺¹O⁻²

Step 2. Identify the changes in oxidation number:

S: +0 ⟶ +6; Change = +6

N: +5 ⟶ +4; Change = -1

Step 3. Equalize the changes in oxidation number.

You need 6 atoms of N for every 1 atom of S. This gives us total changes of -6 and + 6.

Step 4. Insert coefficients to get these numbers.

1S + 6HNO₃ ⟶ 1H₂SO₄ + 6NO₂ + H₂O

Step 5. Balance O.

We have fixed 18 O on the left and 16 O on the right. We need 2 more O on the right. Put a 2 in front of H₂O.

1S + 6HNO₃ ⟶ 1H₂SO₄ + 6NO₂ + 2H₂O

Every formula now has a coefficient. The equation should be balanced.

Step 6. Check that all atoms balance.

Atom Left-hand side Right-hand side

S 1 1

H 6 6

N 6 6

O 18 18

The balanced equation is

S + 6HNO₃ ⟶ H₂SO₄ + 6NO₂ + 2H₂O

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3 years ago

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IgorC [24]

I believe it's two part hydrogen and one part oxygen (H20)

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blondinia [14]

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