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AleksandrR [38]
3 years ago
14

I NEED THE ANSWER IMMEDIATELY TONIGHT, PLEASE!!!

Chemistry
1 answer:
anzhelika [568]3 years ago
5 0

Answer:

Ra,Ba,In,Sb,As,P hope this helps you out good luck

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For each of the following sets of elements, circle the element expected to be most electronegative and draw a box which is expec
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Answer: The element expected to be most electronegative is Ca.

The element expected to be least electronegative is K.

Explanation:

Electronegativity is defined as the property of an element to attract a shared pair of electron towards itself.

Down the group:

The size of an atom increases as we move down the group because a new shell is added and electron gets added up.

As, the size of an element increases, the valence electrons gets away from the nucleus. So, the attraction between the nucleus and the shared pair of electrons decreases

Hence, electronegativity decreases moving from top to bottom down a group

Across a period:

The size of an atom decreases as we move across the period because the electrons get added to the same shell and the nuclear charge keeps on increasing. Thus the electrons get more tightly held by the nucleus.

As, the size of an element decreases, the valence electrons come near to the nucleus. So, the attraction between the nucleus and the shared pair of electrons increases.

Hence, electronegativity increases moving across left to right in a period.

Thus as K, Sc and Ca are arranged across a period, the electronegativity order is K< Sc < Ca.

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3 years ago
for the reaction shown compute the theoretical yield of product in moles each of the initial quantities of reactants. 2 Mn(s)+3
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Answer:

2 mole MnO₂

Explanation:

2Mn(s) + 2O₂(g) => 2MnO₂(s)

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Explain how convection transfers heat. Use information from this video above. Make sure you include the words: heat, density, co
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The heat in particles travels through convection at a certain speed depending on what density a mass has.

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When a substance undergoes a Chemical Change, can the change be reversed? Explain your answer.​
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Answer:When a substance undergoes a chemical change some of the chemical changes can be reversed with a chemical change.

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A chemical change changes all of the element but some chemical changes but very few can be changed back to its original substance only with a chemical change.

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If a substance cannot be separated <br> physically it is?
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Its an element Im pretty sure 
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