Why are electrons important 1 2 3 Electrons

Why are electrons important? 1. 2. 3. Electrons are where an atom bonds Atoms bond because they want to be HAPPY! They want to have EIGHT!

Electron Dot Structures Symbols of atoms with dots to represent the valence-shell electrons 1 2 13 14 15 16 17 H Li 18 He: Be B Na Mg Al C Si N O P S : F : Ne : : Cl : Ar :

Chemical bonds: an attempt to fill electron shells Ionic bonds Covalent bonds

Ionic Bonds l l bond formed between atoms by the transfer of electrons Ionic compounds result when metals react with nonmetals Metals lose electrons (transfer) to match the number of valence electrons of their nearest non metal atom Positive ions form when the number of electrons are less than the number of protons Examples; Na. Cl, Ca. Cl 2, K 2 O

Ionic Bonds: One Big Greedy Thief Dog!

Covalent Bond bond formed by the sharing of electrons Between nonmetallic elements Formed by sharing electron pairs Stable and they are not conductors at any state Examples: O 2, C 2 H 6, H 2 O, Si. C

2. Covalent bonds- Two atoms share one or more pairs of outer-shell electrons.

Types of Chemical Reaction 1. Endothermic reaction 2. Exotermic Reaction

Endothermic Reaction Endothermic reactions are chemical reactions which absorb energy from the environment.

Exothermic Reaction An exothermic reaction is a chemical reaction that releases energy by light or heat.

Let’s see it! https: //www. youtube. com/watch? v=yvy. HVA 1 W w_M&t=80 s