IODINE: Iodine forms a diatomic non-polar covalent molecule. The graphic on the top left shows that iodine has 7 electrons in the outer shell. Since 8 electrons are needed for an octet, two iodine atoms EQUALLY share 2 electrons.

Na2S

Sodium sulfide

Sodium sulfide has an ionic bond, and the chemical equation is Na2S. Sulfur’s electronegativity is 2.58; sodium’s is 0.930 – the difference is 1.65.

KCl is an example of ionic bonding. Below is a simple diagram of potassium and chlorine atoms.

An iodide ion is the ion I−. Compounds with iodine in formal oxidation state −1 are called iodides….Representative iodides.

toluene ionic or covalent bond.

Sodium nitrate

So Na2CO3 has both ionic and covalent bonds.

The answer is (1) CaCO3. The bond between C and O is covalent bond.

Bond between K+ and CN− is ionic where as bond within CN− is covalent. Hence both ionic and covalent bonds are present in KCN.

Examples of compounds that contain only covalent bonds are methane (CH4), carbon monoxide (CO), and iodine monobromide (IBr). Covalent bonding between hydrogen atoms: Since each hydrogen atom has one electron, they are able to fill their outermost shells by sharing a pair of electrons through a covalent bond.

(c ) In NaOH,Na+ and OH- ions are bonded together by ionic bond while in OH-ion, oxygen and hydrogen atoms are bonded together by convalent bond Na+[O-H]-.

Calcium carbonate is another example of a compound with both ionic and covalent bonds. Here calcium acts as the cation, with the carbonate species as the anion. These species share an ionic bond, while the carbon and oxygen atoms in carbonate are covalently bonded.

Iron oxide or ferric oxide has three oxygen atoms and two iron atoms. It is represented by Fe2O3. Since iron is metal and oxygen is non-metal therefore the bonding between oxygen and iron is ionic. …

Explanation: Ionic compounds are formed when a cation reacts with an anion, where electrons are “donated”. For covalent compounds, electrons are shared and only occurs between anions. BaSO4 (Barium sulfate) is an ionic compound.

Answer: This is because :(A) Lattice energy of BaSO4 is greater than MgSO4(B)BaSO, is more covalent than MgSO4(C) Hydration energy of Mg2+ is greater than Ba2+(D) Lattice energy of MgSO4 is greater than BaSO. Reason :Lil has more lattice energy and more hydration energy in comparison is LiBr.

LiCl is covalent while NaCl is ionic.

The sulfate ion. The Lewis structure for the sulfate ion consists of a central sulfur atom with four single bonds to oxygen atoms. This yields the expected total of 32 electrons. Since the sulfur atom started with six valence electrons, two of the S-O bonds are coordinate covalent.

Covalent or molecular compounds form when elements share electrons in a covalent bond to form molecules. Molecular compounds are electrically neutral. Ionic compounds are (usually) formed when a metal reacts with a nonmetal (or a polyatomic ion). Covalent compounds are formed when two nonmetals react with each other.

There is a couple different ways to determine if a bond is ionic or covalent. By definition, an ionic bond is between a metal and a nonmetal, and a covalent bond is between 2 nonmetals. So you usually just look at the periodic table and determine whether your compound is made of a metal/nonmetal or is just 2 nonmetals.

Rules for naming simple covalent compounds:

1. Name the non-metal furthest to the left on the periodic table by its elemental name.
2. Name the other non-metal by its elemental name and an -ide ending.
3. Use the prefixes mono-, di-, tri-…. to indicate the number of that element in the molecule.

When naming molecular compounds prefixes are used to dictate the number of a given element present in the compound. ” mono-” indicates one, “di-” indicates two, “tri-” is three, “tetra-” is four, “penta-” is five, and “hexa-” is six, “hepta-” is seven, “octo-” is eight, “nona-” is nine, and “deca” is ten.

If the compound contains three elements one of which is oxygen then the compound name will end in –ate or –ite, eg Calcium carbonate contains calcium, carbon and oxygen….Rule three.

The name of a compound with two elements has two words. To get the first word we use the name of the first element, or the element to the left of the formula. To get the second word we use the name of the second element and change the suffix to “ide” at the end of the word. What if there is more than one atom?

Cations are positively charged ions. They are formed when a metal loses its electrons. They lose one or more than one electron and do not lose any protons. Some examples of cations are Calcium (Ca2+), Potassium (K+), hydrogen (H+).