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Ksju [112]
2 years ago
13

4. Base your answer to the following question on the elements in Group 2 on the Periodic Table. State, in terms of the number of

electron shells, why the radius of a strontium atom in the ground state is larger than the radius of a magnesium atom in the ground state.​
Chemistry
1 answer:
Zolol [24]2 years ago
5 0

Answer:

The atomic radius of strontium is larger than magnesium because there are more number of shielding electrones in strontium than magnesium, which causes electron-electron repulsion, that makes the electrons in valance shell to expand. Hence it would decrease the effective nuclear charge.

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Which of the following is the best definition of an atom?
lilavasa [31]
C would be correct because atoms can be either negative or positive charged and they can make up living and nonliving things
7 0
3 years ago
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utamate is a polarGlutamate is a blank acidic amino acid, whereas proline is blank. The blank of glutamate may form blank with a
Vanyuwa [196]

Answer:

Polar, nonpolar,polar acidic group R,hydrogen,outer surface,hydrophilic,water and inside.

Explanation:

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6 0
3 years ago
Iron in the 2 oxidation state reacts with potassium dichromate to produce Fe3 and Cr3 according to the equation: 6 Fe2 (aq) Cr2O
allsm [11]

Given :

Volume of Fe^{2+} , V = 132 mL .

Molarity of Fe^{2+}, M = 0.1782 M .

To Find :

How many milliliters of 0.2937 M K_2Cr_2O_7 are required to titrate 132.0 mL of 0.1782 M Fe^{2+} solution .

Solution :

Moles of  Fe_2 :

n=0.1782\times \dfrac{132}{1000}\ mol\\\\n=0.264\ mol

Now , 1 mole of K_2Cr_2O_7 reacts with 6 mole of Fe^{2+} .

So , moles of K_2Cr_2O_7 required is :

N=\dfrac{0.264}{6}=0.044\ mol

Volume required is :

V=\dfrac{N}{M}\\\\V=\dfrac{0.044}{0.2937}\ L\\\\V=0.15\ L=150\ mL

Hence , this is the required solution .

6 0
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4 years ago
Chemical formula for Potassium Hydrogen Nitrate
My name is Ann [436]

Answer:

KNO3

Explanation:

8 0
3 years ago
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