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What type of bond will strontium and sulfur form?
Strontium is an earth metal (element #38), and iodine is a halide non-metal (element #53), therefore they would form an ionic bond. Strontium ions have a +2 charge, and iodines -1, so to form a neutral-charged compound, we need 2 iodines for every Strontium, and the chemical formula would be: SrI2.
Why are ionic compounds usually have high melting point while most simple covalent compounds have low melting point?
Ionic compounds are mad by ionic bonding The two parts of the compound ther for become one by means of moving electronioc and beoming stable there fore the bond and the compound is stronger that conalent compounds which just share the electrons needed for the two (or more ) elements to become a compound so they are weaker
Why is molecule the smallest part of salt?
A molecule is the smallest part of salt because salt is an ionic compound composed of positively charged ions (sodium) and negatively charged ions (chloride) held together by strong electrostatic forces. These ions combine in a fixed ratio to form a stable compound, making the molecule the smallest unit that retains the chemical properties of salt.
What is the example of the uses of covalent compounds as solvent in our daily life?
A covalent compound is a compound in which the atoms that are bonded share electrons rather than transfer electrons from one to the other. While ionic compounds are usually formed when metals bond to nonmetals, covalent compounds are formed when two nonmetals bond to each other. Covalent compounds have the following properties (keep in mind that these are only general properties, and that there are always exceptions to every rule): 1) Covalent compounds generally have much lower melting and boiling points than ionic compounds. As you may recall, ionic compounds have very high melting and boiling points because it takes a lot of energy for all of the + and - charges which make up the crystal to get pulled apart from each other. Essentially, when we have an ionic compound, we need to break all of the ionic bonds in order to make it melt. On the other hand, when we have covalent compounds we don't need to break any bonds at all. This is because covalent compounds form distinct molecules, in which the atoms are bound tightly to one another. Unlike in ionic compounds, these molecules don't interact with each other much (except through relatively weak forces called "intermolecular forces"), making them very easy to pull apart from each other. Since they're easy to separate, covalent compounds have low melting and boiling points. 2) Covalent compounds are soft and squishy (compared to ionic compounds, anyway). The reason for this is similar to the reason that covalent compounds have low melting and boiling points. When you hit an ionic compound with something, it feels very hard. The reason for this is that all of the ionic bonds which hold together the crystal tend to make it very inflexible and hard to move. On the other hand, covalent compounds have these molecules which can very easily move around each other, because there are no bonds between them. As a result, covalent compounds are frequently flexible rather than hard. Think of it like this: Ionic compounds are like giant Lego sculptures. If you hit a Lego sculpture with your fist, it feels hard because all of the Legos are stuck very tightly to one another. Covalent compounds are more like those plastic ball pits they have at fast food playgrounds for little kids. While the balls themselves are held together very tightly (just like covalent molecules are held together tightly), the balls aren't really stuck to each other at all. As a result, when little kids jump into the ball pits they sink in rather than bouncing off. 3) Covalent compounds tend to be more flammable than ionic compounds. The main reason that things burn is because they contain carbon and hydrogen atoms that can react to form carbon dioxide and water when heated with oxygen gas (that's the definition of a combustion reaction). Since carbon and hydrogen have very similar electronegativities, they are mostly found together in covalent compounds. As a result, more covalent compounds than ionic compounds are flammable. There are a couple of exceptions to this rule. The first is with covalent compounds that contain neither carbon nor hydrogen. These tend not to burn, and if they do, they burn by mechanisms other than the classic combustion reaction. The other exception comes with ionic compounds referred to as "organic salts". These organic salts are ionic compounds in which the anion is basically a big covalent molecule containing carbon and hydrogen with just a very small ionic section. As a result, they burn even though they're technically ionic compounds. 4) Covalent compounds don't conduct electricity in water. Electricity is conducted in water from the movement of ions from one place to the other. These ions are the charge carriers which allow water to conduct electricity. Since there are no ions in a covalent compound, they don't conduct electricity in water. 5) Covalent compounds are insoluble in water. Naming Covalent Compounds Covalent compounds are much easier to name than ionic compounds. Here's how you do it: All covalent compounds have two word names. The first word typically corresponds to the first element in the formula and the second corresponds to the second element in the formula except that "-ide" is substituted for the end. As a result, HF is named "hydrogen fluoride", because hydrogen is the first element and fluorine is the second element. If there is more than one atom of an element in a molecule, we need to add prefixes to these words to tell us how many are present. Here are the prefixes you'll need to remember:<center>Number of atoms Prefix </center>1 mono- (use only for oxygen) 2 di- 3 tri- 4 tetra- 5 penta- 6 hexa- 7 hepta- 8 octa- Let's see how this works: Examples: P2O5 - this is named diphosphorus pentoxide, because there are two phosphorus atoms and five oxygen atoms. CO - this is carbon monoxide (you need the "mono-" because there's only one oxygen atom). CF4 - this is carbon tetrafluoride, because there's one carbon atom and four fluorine atoms.
How do covalent bonds and ionic bonds compare?
Covalent bonding involves the sharing of electrons. Ionic bonding involves the transfer of electrons.
What 2 element types form an ionic compound?
Metal and nonmetal elements typically form ionic compounds. Metals lose electrons to become positively charged cations, while nonmetals gain electrons to become negatively charged anions, resulting in an overall neutral ionic compound.
How are ionic compounds formed?
All compounds are either positive or negative. Alkaline compounds are negative and acid compounds are positive. Look in the periodic table to find the compounds' chemical formula you are looking for. You want to form ionic compounds; so say you wanted to work out the formula for zinc nitrate. Zinc is Zn2+ and nitrate is NO3-. You use the Zn and take the 2 out. You don't with the nitrate because there is nothing to swap; the 3 is already converted so you don't swap that. You can't literally add the 2 from the zinc onto the 3 so you have to use brackets. Zn goes at the front of the formula because it isn't in brackets. So... Zn(NO3)2. The 2 goes outside the brackets because it cant be literally added on. Hope this helps but its not very clear, From MILLY
What ions will you need to build a ionic compound?
To build an ionic compound, you will need to have at least one cation (positively charged ion) and one anion (negatively charged ion) that can attract each other due to their opposite charges. The charges on the ions must balance out in order to form a stable compound.
What is ionic compounding made of?
Ionic compounds are made of positively charged ions (cations) and negatively charged ions (anions) held together by electrostatic forces of attraction. The cations are typically metal atoms that lose electrons to form a positive charge, while the anions are non-metal atoms that gain electrons to form a negative charge. The ratio of cations to anions in an ionic compound is determined by the need to achieve overall electrical neutrality.
What are the 3 characteristics of ionic compounds?
Don't know which three you need, but here's three: - they are usually crystalline solids at room temperature. - they have high melting points - they are poor conductors of electricity Other characteristics that are a bit more in-depth: - they are usually water-soluble - they are often metal to non-metal combinations - they exhibit high electronegativity differences - in solution, they are electrolytes
What is the Melting point of ionic compounds?
This is a phase change from solid to liquid which occurs at a fixed temperature when the ionic lattice breaks down. In general ionic compounds are high melting.
Is Na2O an Ionic or Covalent?
Yes it is ionic because the valence electron of sodium is 1 so two molecules of sodium gives two electrons to oxygen which is in need of 2 electrons. Sodium now have a charge of +1 and Oxygen has a charge of -2
Why do ionic compounds need at least one metal?
Ionic compounds do not require the presence of a metal, for example ammonium chloride is ionic and does not contain a metallic element. What is true is that the majority of ionic compounds involve at least one metal.
Why are ionic compounds insoluble in organic compounds?
It isn't strictly true, but generally ionic compounds are not highly soluble in organic solvents because ionic compounds need a highly polar solvent to dissolve well (such as water) and in general organic compounds are not as polar as water. Remember, like dissolves like. However, many ionic compounds are very soluble in a variety of organic solvents, just not as much as in water.
Why do ionic bond need to gain and loss electrons?
Because by definition, ionic bond is the force of attraction between positively charged cations and negatively charged anions. To form ions, atoms should be gained (resulting in anions) and lost (resulting in cations).
Do ionic compounds need to contain metals?
No, an ionic compound can be made up of any two substances that split into ions when put in solution (dissolved). An example of a non-metallic ionic compound is ammonium nitrate (NH4N03). When dissolved in water it separates into an ammonium ion (+NH4) and a nitrate ion (NO3).Also, whenever an acid is dissolved in water an ionic compound is formed. for example when sulfuric acid is dissolved in water it forms hydroxyl sulphate ((H30)2SO4) which separates into hydroxyl (+H3O) and sulphate ions (-2SO4).
Why do solid ionic compounds have high melting points?
Ionic compounds have strong bonds holding the crystal lattice together that are due to the attraction between the oppositely charged cations and anions. Covalent compounds which are made up of discrete molecules (not giant molecular compounds like silica) have only weak intermolecular forces holding the solid form together and therefore these solids are easier to "break up" with thermal energy. t.
