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Answer:

The lattice energy decreases down the group and increases across the period, therefore, the lattice energy of LiF > lattice energy of LiI, and the lattice energy of NaCl < the lattice energy of AlCl₃

Explanation:

The given parameters are;

Compound [tex]{}[/tex]                                    Lattice Energy (kJ/mol)

LiF  [tex]{}[/tex]                                                     1030

NaCl  [tex]{}[/tex]                                                  788

MgCl₂  [tex]{}[/tex]                                                2326

LiI  [tex]{}[/tex]                                                       730

AlCl₃   [tex]{}[/tex]                                                  5376

Lattice is the energy that must be added in order to split one mole of a ionic solid compound into gaseous ions

Given that the force of attraction between charges is inversely proportional to the square of the distance separating the charges, we have that as the atomic radius increases progressively down the group, the lattice energy decreases, therefore, LiF which has a shorter inter nuclear distance than LiI due to fluorine, F, being higher up on the periodic table than iodine, I, has a greater lattice energy than LiI

Similarly, given that the atomic radius decreases across the period, and that sodium, Na, comes before aluminum, Al, as we move across period 3, of the periodic table, the inter nuclear distance between atoms of in NaCl is larger than the internuclear distances between the atoms of AlCl₃, as well as the presence of more chlorine atoms in AlCl₃ than in NaCl, the lattice energy of NaCl is smaller than the lattice energy of AlCl₃.

Answer:

An atom is a basic unit of a chemical element, such as hydrogen, helium ... a fluorine atom since the three additional protons the fluorine has will pull its ... As an example, potassium (K) has a larger average atomic radius (

Answer:

A lithium ion has a charge of   +1.

A calcium ion has a charge of   +2.

An aluminum ion has a charge of   +3.

A fluorine ion has a charge of   -1.

An oxygen ion has a charge of   -2.

Below, the correct charges of the elements are listed;

The ionic or electrical charge of an element is the new state the element acquires because of losing or gaining an electron.

When elements lose their electrons, they tend to attain a positive charge and when they gain an electron, they tend to acquire a negative charge. To easily identify the charge of the ions, the periodic table should be used.

Elements (metals) found on the left side of the periodic table tend to have a positive charge while elements (non-metals) on the right side of the table usually assume a negative charge.

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A sample of oxygen gas at STP is depicted in the diagram in the picture (4) of the image attached.

An oxygen molecule is a diatomic molecule, which is a molecule made up of just two atoms of the same element. The oxygen molecule in this instance is made up of two oxygen atoms.

If you have a lot of oxygen atoms at STP, they will spontaneously combine to produce O₂ because double bonds between oxygen atoms make their structure more stable.

If we carefully examine the figure in the attached image, we will see that it depicts a molecule made up of two atoms of the same element, which perfectly matches the definition of the oxygen molecule.

Therefore, this is shown in diagram (4), spontaneously combine to produce O₂  because double bonds between oxygen atoms make their structure more stable.

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Given parameters:

Mass of H₃PO₄  = 49g

Unknown:

Number of moles  = ?

Solution:

To find the number of moles of a given specie;

   number of moles = [tex]\frac{mass}{molar mass}[/tex]

Molar mass = 3(1) + 31 + 4(16) = 98g/mol

Input the parameters and solve;

       Number of moles  = [tex]\frac{49}{98}[/tex]  = 0.5mole

The number of moles is 0.5mole

Answer:

Types of atomic orbitals present in the third principal energy are s, p and d only .

Explanation:

Thus , the correct option is C (s , p and d only .)

Answer:

s, p, and d

Explanation:

Answer:

The movement is random

Explanation:

Answer:

c

Explanation:

i hope this helps

The two chemical elements that are most likely to bond with each other are: C. Chlorine and Calcium.

A chemical bond refers to the forces of attraction existing between ions, crystals, atoms or molecules and that are typically responsible for the formation of new chemical compounds.

In Chemistry, there are three (3) main types of chemical bonds and these are:

I. Hydrogen bonds.

II. Covalent bonds.

III. Ionic bonds.

An ionic bond can be defined as a chemical bond which involves a metallic element transferring one or more electrons to a non-metallic element.

In this scenario, the element Chlorine which have seven valence electrons would accept an electron from Calcium (Alkali metal) to form a chemical compound called calcium chloride.

In conclusion, two chemical elements that are most likely to bond with each other by forming an ionic bond are Chlorine and Calcium.

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Answer:

Option C = 150

Explanation:

First of all we will understand what is law of conservation of mass.

Law of conservation of mass:

This law stated that, mass can neither be created nor destroyed in a chemical equation.

This law was given by French chemist  Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.

For example:

In given photosynthesis reaction:

6CO₂ + 6H₂O + energy → C₆H₁₂O₆ + 6O₂

there are six number of carbon atoms, eighteen oxygen atoms and twelve hydrogen atoms on the both side of chemical equation so this reaction followed the law of conservation of mass because mases are same on both side.

In given chemical reaction:

AB    + CD      →      X

50 g +  100 g    =  150 g

Thus option c is correct.

Answer:

c. Endothermic

Explanation:

endothermic reactions absorb heat, exothermic reactions release heat.

Answer:

transporting oxygen and nutrients to the lungs and tissues

forming blood clots to prevent excess blood loss

carrying cells and antibodies that fight infection

Explanation:

.......(◍•ᴗ•◍).......

Answer:

Li2S> Na2S> K2S> CsS

Explanation:

The lattice energy of ionic species depends on the relative sizes of ions in the ionic compounds. As the size of ions increases, the lattice energy decreases and vice versa.

When the size of the anions are the same, the lattice energy now depends on the relative sizes of the cations. Therefore, since all the compounds are sulphides and the order of magnitude of ionic sizes is: Li^+ < Na^+ < K^+ < Cs^+.

Therefore, the order of decrease in lattice energy is; Li2S> Na2S> K2S> CsS

Answer:

Helium is 2 electrons

Chlorine is 7 electrons

Potassium is 1 electron

and also Potassium is going to give chlorine an electron and do ionic bonding because chlorine is missing one electron and potassium has only 1 electron in valence

Explanation:

Outermost shell is the outermost ring so just count black dots on there for each one

Answer:

Nitrogen has 7 protons, 7 neutrons, and 7 electrons.

So, I'm not entirely sure about the choices you provided :)

Answer:Whereas weather refers to short-term changes in the atmosphere, climate describes what the weather is like over a long period of time in a specific area. Different regions can have different climates. ... Weather tells you what to wear each day. Climate tells you what types of clothes to have in your closet.

Explanation:well bc i am in 10th grade this kinda easy lol hoped i helped

Answer:

Explanation:

Weather is the current state of weather while, climate is the most common weather of that region over a time of 30 years.

Answer:

I literally just answered this question

Explanation:

Give me a brainliest

Answer:the atoms of a solid aluminium can are close together vibrating in a rigid structure if the can is warmed up on a hot plate

Explanation:

Answer:

Ca^+ and CO3^2-

Explanation:

Limestone is CaCO3. It is an important component of the shell of many species that have shells.

Limestone contains th calcium ion (Ca^+) and the carbonate ion (CO3^2-).

Limestone is used as a building material. It is usually mined as deposits below the ground.

Answer:

Nuclear

Explanation:

Nuclear is a un-natural and newer type of energy source that can spread lethal toxins into the air causing living things to die. On top of that is it sometimes very unstable and sometimes if it's not disposed correctly it can cause high levels of radiation.

Answer:

0.8

Explanation:

since when you add them up you get 3.12 and divide it you get 0.78. Round and you will get 0.8

Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\[/tex]

From the question

mass = 10 g

volume = final volume of water - initial volume of water

volume = 52.1 - 50.7 = 1.4 mL

We have

[tex]density = \frac{10}{1.4} \\ = 7.142857...[/tex]

We have the final answer as

Hope this helps you

Answer:

mercury or Hg

Explanation:

i looked at the periodic table haha

hope this helps and is right <3

Answer:

left to right

The periods go on a periodic table, left to right. The periodic table is the systematic arrangement of elements in row and column.

The chemical elements are arranged in rows and columns in the periodic table, sometimes referred to as the periodic table of the elements. It is often used in physics, chemistry, and other disciplines, and is frequently regarded as a symbol of chemistry.

Because of the orderly arrangement of the elements, it is known as the periodic table. Periods refers to the horizontal rows, and Groups to the vertical columns.

The most significant role of hydrogen in the human body is to maintain your level of hydration, making it the most significant element on the periodic table.

All known elements are grouped together in the periodic table of elements into groups with related characteristics. It becomes a crucial tool for chemists, nanotechnologies, and other scientists as a result. You can forecast how chemicals will behave if you learn to utilize and comprehend the periodic table.

Thus, The periods go on a periodic table, left to right.

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