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3 years ago

Atomic size generally _____.

Chemistry

2 answers:

Lunna [17]3 years ago

4 0

A. Increases as you move from left to right across a period

mafiozo [28]3 years ago

4 0

Atomic size generally

D. decreases as you move from left to right across a period

elements are classified into periods based on the number of energy shells.

elements that have the same number of energy shells fall into the same period.

as you go from left to right across a period, the atomic number increases. Atomic number is the number of protons. In ground state atoms the protons and electrons are the same.

so as you go across a period, the number of protons and electrons increase.

protons are positively charged and located in the nucleus. Electrons are negatively charged and are in energy shells. With higher number of protons in the nucleus, higher the positive charge in the nucleus. Then the force of attraction from the nucleus towards the electrons in the energy shells are higher.It will pull the energy shells more towards the nucleus making the atomic size smaller.

therefore atomic size decreases as you move from left to right across a period

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Answer:

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2 years ago

Select the correct answer.

ankoles [38]

It would still have oceans but no atmospheric water in Earth if no icy debris had arrived.

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Explanation:

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3 years ago

What is the mass of ca(oh)2 in 110. mL of 1.244 M ca(oh)2 solution

stealth61 [152]

V= 110mL = 110cm³ = 0,11dm³
C = 1,244 mol/L = 1,244 mol/dm³

C = n/V
n = 1,244×0,11
n = 0,13684 moles

mCa(OH)₂ = 74 g/mol

1 mole Ca(OH)₂ ------------ 74g
0,13684 ---------------------- X
X = 74×0,13684
X = 10,12616g

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3 years ago

If copper carbonate system is heated for too short a time, what will you notice for mass percent of copper be too large or too s

sammy [17]

Answer:

The mass percent of copper as element is the same.

Explanation:

First of all we need the reaction that is presented below:

$CuCO_{3 (s)} +Heat$ → $CuO_{(s)} + CO_{2 (g)}$

The mass percent of copper (Cu) as element is the same because of during the reaction the element only transform its nature from copper carbonate ( $CuCO_{3 (s)}$ ) to copper oxide ( $CuO_{(s)}$ ), the latter is a solid and will remain in the system.

On the other hand, you will note that the global percentage mass will be small because of the reaction produce ( $CO_{2 (g)}$ ) that is a gas and this one will escape for the system.

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3 years ago

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Andreas93 [3]

Answer:

Explanation:

bc inorganic compoud refers to all compound that do not contain carbons.

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3 years ago