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stiks02 [169]
3 years ago
8

*

Chemistry
1 answer:
Natasha_Volkova [10]3 years ago
4 0

to be honestl id ldm

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Which of the following theories provides information concerning both molecular shape and molecular bonding?
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Looking across period 4 of the periodic table, potassium (atomic number 19) is followed by calcium (atomic number 20), which is
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While staying in the same period, if we move from left to right across the period, the atomic radius decreases. The reason is, in a period the number of shells remain the same and the number of electrons and protons increase as we move across the period to the right. The increased electrons and protons attract each other with greater force and hence the atomic size decreases. 

So the element on the left most will have the largest atomic radius. So the correct ans is Potassium. Potassium will have the largest atomic size among Potassium, Calcium and Scandium. 
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The smallest particle to retain the properties of an element is an?
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How much heat is required to raise the temperature of 670g of water from 25.7"C to 66,0°C? The specific heat
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Answer:

Explanation:

q= mc theta

where,

Q = heat gained

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theta =Change in temperature=( 66-25.7)

Now put all the given values in the above formula, we get the amount of heat needed.

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