Chemical Bond

Number of Bond There are 3 types of covalent bond: Single covalent bond – sharing of one pair of electrons Double covalent bond – sharing of two pairs of electrons Triple covalent bond – sharing of three pairs of electrons Example Number of electrons Example and type of covalent bond 1 pair type of covalent … Read more

Covalent Bonding Covalent bonds are formed by atoms sharing electrons to form molecules. This type of bond usually formed between two non-metallic elements. In the formation of covalent bonds, atoms of non-metals will combine with each other to donate one, two or three electrons for sharing. The compound formed through the formation of covalent bonds … Read more

Predicting the Formula of Ionic Compound We can predict the charge of the ions formed from an element base on the group of the element. From the charge, we can then write the formula of the ionic compound formed. In short, we can predict the formula of an ionic compound if we know the group … Read more

Ionic Bonding Ionic bonds are formed by one atom transferring electrons to another atom to form ions.  Ions are atoms, or groups of atoms, which have lost or gained electrons. The atom losing electrons forms a positive ion (a cation) and is usually a metal. The atom gaining electrons forms a negative ion (an anion) … Read more

Formation of Negative Ion Negative ions are formed among atoms of non-metal elements except group-18 elements. Non-metal elements usually located in group 15, 16 and 17 in the periodic table and have 5, 6 or 7 valence electrons. To achieve octet arrangement of electrons, their atoms will receive 3, 2 or 1 electron. As a … Read more

Formation of Positive Ion Usually, the atom of metals consists of 1, 2 or 3 valence electrons. In order to achieve octet electrons arrangement, the atoms will release the valence electrons. After releasing the valence electrons, the protons in the nucleus will outnumber the electrons. As a result, positive ions formed. Example: Formation of Ion … Read more

Formation of Ion An ion is an atom or group of atoms carrying positive or negative charge. Example Ca2+, O2-, SO42- etc. If a particle has equal numbers of protons (+) and electrons (-), the particle charge is zero, and the particle is said to be neutral. In a chemical reaction, electron(s) can be transferred … Read more

Chemical Bonds 2 types of chemical bonds are commonly formed between atoms, namely Ionic Bond Covalent Bond The Ionic Bond (Ionic Bond) By releasing or receiving electron(s), the atoms will become ions and consequently form ionic bond between the ions. Ionic bonds are always formed between metal and non-metal. For example, sodium (metal) react with … Read more

Stability of Noble Gases Stability of Noble Gases Group 18 elements (Noble Gases) exist as mono-atom in nature. They are inert in nature and do not react with any other elements (or themselves) to form any chemical compounds. In other words, they are chemically very stable (or chemically very non-reactive). Duplet and Octet Electron Arrangement … Read more

Revision Notes Stability of Noble Gases Chemical Bonds Formation of Ions Formation of Positive Ions Formation of Negative Ions Ionic Bonding Predicting the Formula of Ionic Compound Covalent Bonding Number of Bonds Predicting the Molecular Formula of Covalent Compounds Physical Properties of Ionic Compounds and Covalent Compounds Physical Properties of Covalent Compounds The Macromolecular Compounds … Read more