chemical bond. Valence Electrons
Chapter 1 Section 1 Pages 4-7
1. Define all the vocabulary words. Chemical Bonding: Chemical bonding is the joining of atoms to form new substances. Chemical Bond: An interaction that holds two atoms together is called a chemical bond. Valence Electrons: The electrons in an atom’s outermost energy level.
Properties of new substances are different
from the original elements. When chemical bonds are formed, valence
electrons are shared, gained, or lost.
Atomic # = Number of Protons (+) = Number of
electrons (-) Therefore the atoms is neutral Use energy levels to model arrangement of
electrons Only outermost electrons form bonds = valence electrons Within in a group – atoms of each element have the same number of valence electrons
Number of valence electrons determines whether the
atoms will form bonds with other atoms. G18 – Noble Gases – do not usually form bonds – their outer level is full! When atoms form bonds, they do so by gaining, sharing, or losing to fill their outermost energy level. Exception to the octet rule – He and H – they have only one energy level, therefore 2ve fill their outermost level.
1. Define all the vocabulary words. Chemical Bonding: Chemical bonding is the joining of atoms to form new substances. Chemical Bond: An interaction that holds two atoms together is called a chemical bond. Valence Electrons: The electrons in an atom’s outermost energy level.
Properties of new substances are different
from the original elements. When chemical bonds are formed, valence
electrons are shared, gained, or lost.
Atomic # = Number of Protons (+) = Number of
electrons (-) Therefore the atoms is neutral Use energy levels to model arrangement of
electrons Only outermost electrons form bonds = valence electrons Within in a group – atoms of each element have the same number of valence electrons
Number of valence electrons determines whether the
atoms will form bonds with other atoms. G18 – Noble Gases – do not usually form bonds – their outer level is full! When atoms form bonds, they do so by gaining, sharing, or losing to fill their outermost energy level. Exception to the octet rule – He and H – they have only one energy level, therefore 2ve fill their outermost level.
