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The atomic radius of Argon is smaller than the atomic radius of sodium because the effective nuclear charge increases as we move left to right in a period.

The atomic radius can be described as the shortest distance between the center of the nucleus of the atom and the outermost shell of the atom. An atomic radius can also be defined as half the distance between two atoms of the same element bonded together.

In general, the atomic radius of an atom reduces as we move from left to right in a period on the periodic table because while moving from left to right in a period, there is an increase in the effective nuclear charge. In periods, the valence electrons enter in the same outermost shell.

The atomic radius of atom increases when we move down a group because of the addition of a new principle shell.

Sodium is present at beginning of the third period and the Argon is present at the end of the same period. Therefore, Argon experiences a more effective nuclear charge than sodium so it has a smaller atomic radius.

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Taking into account the definition of ionization energy and electronegativity, you can say that the significance of the similarity of these trends  is that while electrons are more attracted to the nucleus (electronegativity), more energy is needed to extract an electron from a neutral atom (ionization energy).

Electrons are held in atoms by their attraction to the nucleus, which means that energy is needed to remove an electron from the atom.

Ionization energy, also called ionization potential, is the necessary energy that must be supplied to a neutral, gaseous, ground-state atom to remove an electron from an atom. When an electron is removed from a neutral atom, a cation with a charge equal to +1 is formed.

The further away the electron is from the nucleus, the easier it is to remove it, that is, the less energy is needed.

In a group the atoms have the same electronic structure in the outermost shell. But when going down in the same group, the electrons find themselves in shells that are farther and farther away from the nucleus, being less and less attracted. The size of the atom increases as the number of electronic shells increases, increasing the atomic radius when descending in a group. But the electrons are farther from the nucleus, and the easier it will be to expel them. That is, its extraction from the atom is facilitated. So the ionization energy decreases when descending in a group. In other words, ionization energy is a function of atomic radius; the larger the radius, the less energy is required to remove the electron from the outermost orbital.

By increasing the atomic number of the elements of the same period, the nuclear attraction on the outermost electron increases, since the atomic radius decreases and the effective nuclear charge on it increases.

For this reason, in a period, as the atomic number increases, the ionization energy becomes greater.

The electronegativity of an element is defined as the relative ability of an atom to attract electrons from another atom to chemically bond and form a compound.

In other words, electronegativity is a measure of the attractive force that one atom exerts on the electrons of another when a chemical bond forms.

In the groups, the electronegativity decreases from top to bottom because the valence shell moves away from the nucleus and with this the attraction that the nucleus exerts on the valence electrons decreases.

In the periods, the electronegativity increases from left to right, because the number of electrons in the valence shell increases, so the attraction of other electrons increases to complete the valence shell and reach a stable state.

The significance of the similarity of these trends  is that while electrons are more attracted to the nucleus (electronegativity), more energy is needed to extract an electron from a neutral atom (ionization energy).

Then, electronegativity is related to ionization energy in the following way: an atom with a high ionization potential has a high electronegativity. On the contrary, atoms with low ionization potential have small electronegativity.

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The number of units of aluminum chloride (AlCl₃) that can be produced from 30 atoms of aluminum (Al) is 30 units

The balanced equation for the reaction is given below:

2Al + 3Cl₂ — > 2AlCl₃

From the balanced equation above,

2 atoms of Al reacted to produce 2 units of AlCl₃.

With the above information, we can determine the number of units of AlCl₃ that can be produced by the reaction of 30 atoms of Al. This can be obtained as follow:

From the balanced equation above,

2 atoms of Al reacted to produce 2 units of AlCl₃.

Therefore,

30 atoms of Al will also react to produce 30 units of AlCl₃.

Thus, 30 units of AlCl₃ were obtained from the reaction.

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Explanation:

A balanced equation demonstrates the conservation of mass by having the same number of each type of atom on both sides of the arrow. enjoy

Answer:

It show that no atoms have been gained or lost during reaction

Explanation:

The phenomenon is known as the Greenhouse Effect.

When the sun's energy reaches the Earth, some is reflected into space, but the rest is absorbed by gases and warms the atmosphere. The phenomenon is known as the Greenhouse Effect.

Answer:

7.53×10^23

Explanation:

i dont know how

Answer:

There are 6.25×10²³ atoms in 1.25 moles of Zn

Answer:It’s cyclone movement

Explanation:

Answer:

oxygen

Explanation:

Answer:

Sources of nitrate that can enter your well include fertilizers, septic systems, animal feedlots, industrial waste, and food processing waste.

Answer:

The answer is 375.54 g of AgBr

Explanation:

Mass (g) = Concentration (mol/L) x volume (L) x Molecular Weight of AgBr (g/mol)

Mass = 2M x 1L x 187.77 g/mol

Mass = 375.54g

Answer:

Atom

Explanation:

An atom can absorb or emit one photon when an electron makes a transition from one stationary state, or energy level, to another. Conservation of energy determines the energy of the photon and thus the frequency of the emitted or absorbed light.

Answer:

Melting

Explanation:

• A chemical change is a change that can be reversed.

Other chemical changes include;

Answer: In metallic bonds, the valence electrons from the s and p orbitals of the interacting metal atoms delocalize. That is to say, instead of orbiting their respective metal atoms, they form a “sea” of electrons that surrounds the positively charged atomic nuclei of the interacting metal ions. Metals are shiny.

Explanation: Hope this helped!

Answer:

Explanation:

An Observation

Answer:

a new substance forms

Explanation:

Answer:

A new substance formed

Explanation:

Answer:

D. Describe the limitations in detail in their final report.

Explanation:

Answer:

D. Describe the limitations in detail in their final report.

Answer:

Every amino acid also has another atom or group of atoms bonded to the central atom known as the R group. This R group, or side chain, gives each amino acid proteins specific characteristics, including size, polarity, and pH.

Answer:

19.3 g/cm3

Explanation:

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Structural isomerism is based on the existence of different molecular

structures formed by the same elements.

The statement that is not correct with respect to structural isomers is; All

structural isomers show hydrogen bonding.

Reason:

Structural isomers are isomers that have different molecular structures but

the same molecular formula. They are referred to as constitutional isomers

Therefore;

However;

Therefore, the statement that is not correct with respect to structural isomers is; All structural isomers show hydrogen bonding.

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The question options are;

The same empirical formula among structural isomers.

Different physical and chemical properties can be possessed by structural isomers.

Structural isomers have different structural formulas.

Hydrogen bonding is shown in all structural isomers.

All the above statements are correct.

d- Helium in air me air is made up of various gases

Answer:

3d

Explanation:

Answer:

maybe 25 joules

Explanation:

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If 5 J (joules) of electrical energy is used to power an iron, 25 joules of heat and steam should it be transformed into.

Energy is referred to by scientists as the capacity for work. People have figured out how to transform energy from one form to another and then use it to accomplish tasks, making modern civilization possible.

Walking and bicycling, driving cars on roads and boats through water, cooking meals on stoves, making ice in freezers, lighting our homes and workplaces, producing goods, and sending astronauts into space all require the usage of energy.

Energy is capable of changing its forms. For instance, a person's body stores chemical energy from the food they consume until they may use it as kinetic energy when working or playing.

Therefore, If 5 J (joules) of electrical energy is used to power an iron, 25 joules of heat and steam should it be transformed into.

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Answer:

5 valence electrons

Explanation:

Phosphorus is in group VA so it has 5 valence electrons and Oxygen is in group VIA so each oxygen has 6 valence electrons.

Answer:

You should never throw water on an electrical fire because water conducts electricity and you could be electrocuted.

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Answer:

a

Explanation:

a