Chemistry. Please Help. I do not understand this?

Question

can someone please explain to me, Ionic bonds and covalent bonds and how you can tell what elements are Ionic and what are covalent

Thank you so much

Answer 1

i learned dat in 8th grade its not chemistry

Answer 2

With IONIC bonds, atoms can form compounds by a shift of one or more electrons from the cation to the anion. Most often, the resulting ions have a completely full periodic shell by this shift.

In the case of NaCl, the ions are Na+ and Cl-. In the case of Na+, there are 10 electrons with the Na nucleus, 2 in the first shell, and 8 in the second shell. In the case of Cl-, there are 18 electrons with the Cl nucleus, 2 in the first shell, 2 in the second shell, and 2 in the 3d shell.

In the case of covalent bonds, the electrons are SHARED in a specific bond between atoms. The sharing fills the shells of the atoms involved. Thus, in H2O, oxygen shares one electron with each hydrogen. This brings the oxygen outer shell to 8 electrons instead of 6 for the atom, but each shared pair is counted as 1 for the sake of electro-neutrality, so the electro-neutral count is still 6 for oxygen and 1 for each hydrogen.

As a rule of thumb, the alkali and alkali earth elements form ionic compounds.

Answer 3

chemical bonds are made through shared electron pairs. depending on the electronegativity of the bonding atoms, this electron pair might be in the middle between the two (covalent non-polar bond, electronegativities of the bonding elements are the same) or pulled towards one of them (slight difference in electronegativity, no more than 1.8, we than have a polar covalent bond) or totally belonging to one of them (the extreme case, electronegativity difference above 1.8, ionic bond).
generally metals form ionic bonds with non-metals. all other bonds are considered more or less covalent.
and being covalent or ionic is the property of a bond, not of an atom!

Answer 4

Bonds cannot be strictly divided between ionic and covalent; Pauling showed that both characteristics are present, in varying degrees, in most bonds. Salts such as sodium chloride, or other compounds of elements of highly dissimilar electronegativity, are basically ionic. Substances such as sulfur dioxide, in which the elements are of similar electronegativity, are mostly covalent.

Answer 5

Covalent bonds form between nonmetals.
Ex.---H + O --> H2O, water

Ionic bonds are formed between a metal and a nonmetal.
Ex. --- Na + Cl ----> NaCl. table salt
K + O ---> K2O

Answer 6

ionic bonds are between non metal and metal elements and covalent bonds are between non metal elements

Answer 7

covalent bond

Force holding atoms in a molecule together as a specific, separate entity (as opposed to, e.g., colloidal aggregates; see bonding). In covalent bonds, two atoms share one or more pairs of valence electrons to give each atom the stability found in a noble gas. In single bonds (e.g., H-H in molecular hydrogen), one electron pair is shared; in double bonds (e.g., O=O in molecular oxygen or H2C=CH2 in ethylene), two; in triple bonds (e.g., HCºCH in acetylene), three. In coordinate covalent bonds, additional electron pairs are shared with another atom, usually forming a functional group, such as sulfate (SO4) or phosphate (PO4). The number of bonds and the atoms participating in each (including any additional paired electrons) give molecules their configuration; the slight negative and positive charges at the opposite ends of a covalent bond are the reason most molecules have some polarity (see electrophile; nucleophile). Carbon in organic compounds can have as many as four single bonds, each pointing to one vertex of a tetrahedron; as a result, certain molecules exist in mirror-image forms (see optical activity). Double bonds are rigid, leading to the possibility of geometric isomers (see isomerism). Some types of bonds, such as the amide linkages that join the amino acids in peptides and proteins (peptide bonds), are apparently single but have some double-bond characteristics because of the electronic structure of the participating atoms. The configurations of enzymes and their substrates, determined by their covalent bonds (particularly the peptide bonds) and hydrogen bonds, are crucial to the reactions they participate in, which are fundamental to all life. See also aromatic compound; compare ionic bond.



ionic bond

Electrostatic attraction between oppositely charged ions in a chemical compound. Such a bond forms when one or more electrons are transferred from one neutral atom (typically a metal, which becomes a cation) to another (typically a nonmetallic element or group, which becomes an anion). The two types of ion are held together by electrostatic forces in a solid that does not comprise neutral molecules as such; rather, each ion has neighbours of the opposite charge in an ordered overall crystalline structure. When, for example, crystals of common salt (sodium chloride, NaCl) are dissolved in water, they dissociate (see dissociation) into two kinds of ions in equal numbers, sodium cations (Na+) and chloride anions (Cl-). See also bonding; covalent bond.

Answer 8

http://hyperphysics.phy-astr.gsu.edu/hbase/chemical/bond.html
try this site or else do mail me,i'll surely help u