22. Because Aluminum forms stronger metallic bonds(3 valance electrons) while Potassium forms weaker metallic bonds(1 valance electrons) Stronger metallic bonding results in higher melting point
2H₂(g) + O₂(g) → 2H₂O(l) Determine:
1️⃣ Which reactant is the limiting reactant when 24 L of hydrogen gas react with 14.4 L of oxygen gas at RTP.
2️⃣ The volume of the excess reactant remaining after the reaction.
1.It’s the SI unit for the amount of substance, one mole of any substance contains 6.022×10²³ (avogardo’s number)
Because it helps them in dealing with extremely small particles like atom and molecule.
2.Atom is the smallest particle of an elementO
Molcule is a group of 2 or more atoms that are chemically bonded together and retains it’s Chem properties and it’s a covalent compound (exists in nature) O2
Formula unit it’s an ionic compound that exists in the form of a crystal lattice( exist in nature in ionic compund ) NaCl
(10²³×6.022× 2). 3.
1.204×10²⁴ atom
2×1.204×10²⁴
2.408×10²⁴ atom
Last edited 6 شهور by Fatema Ahmed
Fatema Ahmed
20/09/2025 11:41 م
.
Walaa Mohammed
18/09/2025 3:22 م
page 2
Walaa Mohammed
18/09/2025 3:20 م
page 1
Walaa Mohammed
18/09/2025 3:05 م
.
Walaa Mohammed
18/09/2025 3:01 م
home work….
Walaa Mohammed
18/09/2025 2:34 م
we have explained the molar mass
Last edited 6 شهور by Walaa Mohammed
Walaa Mohammed
17/09/2025 1:03 م
We have explained an introduction to Chemistry and the concept of the Mole
.///////////
22. Because Aluminum forms stronger metallic bonds(3 valance electrons) while Potassium forms weaker metallic bonds(1 valance electrons) Stronger metallic bonding results in higher melting point
Physical bonds
…
VSEPR
Hybridization SP3, SP2and SP
V.B.T
Octet role and lewis diagram
HW:
Stereo structure and polarity
H.W
Revision: types of covalent bond
H.W
lewis eletron_dot symbols
final exam revision
application on ch 1
Revision on chapter 1
Revision chapter3
https://docs.google.com/forms/d/e/1FAIpQLSdw44S9YDBnHyqrWwrHrcujaisdSd1zsdQeRkJYJlU2qRhi-g/viewform?usp=header
Revision on chapter 2 https://docs.google.com/forms/d/e/1FAIpQLSdez_y-_vQnn8kXRQzg5t0Jp_AxHDBRNfKwAAEh-zRoU0uDjA/viewform?usp=header
Decemer,s exam
types of oxidation &reduction reaction
/;:’
applications on oxidation numbers
oxidation numbers
introduction on oxidative numbers
LESSON 3
ELECTRON AFFINITY
ionization potential
Atomic radius and ionic radius
Revision on lesson 1ch3
Types of periodic table elements
Blocks of periodic table
Modern periodic table
Revision &applications on lesson3
Hund,s principal
Aufbau(building_up)principal
Spin quantum numbers &paul,s exclusion principle
Magnetic number & revision on principle and secondary quantum numbers
الكتاب
principal &secondry quantum
Modern atomic theory
..
NOV .Exam
FOLLOW BOHR,S ATOMIC NUMBER
revision on lesson 1
Bohr,s atomic model
Atomic emission spectrum
Evolution of the concept of atomic structure
+ CHAPTER 1 EXAM
Dilution of solution
Test
/;
october,s chemistry test
concentration of solution
applications on molecular fromula
HOMEWORK
MOLOCULAR FROMULA
..H.W
كتاب المعاصر chemistry
emiprical fromula &application
applications &problems on limiting reactant
2H₂(g) + O₂(g) → 2H₂O(l) Determine:
1️⃣ Which reactant is the limiting reactant when 24 L of hydrogen gas react with 14.4 L of oxygen gas at RTP.
2️⃣ The volume of the excess reactant remaining after the reaction.
limiting reactant
The Homework
*
Home work
lesson 2
volume of moles
=
;
H.W
,
applications on mass &number of moles
https://drive.google.com/file/d/10_a_ms2aRdcoxMSHh7Qx2gyk4ENCgAis/view?usp=drivesdk
https://drive.google.com/file/d/1t35ML3m0Siy44Cl4sbUzzblx9z8y96_o/view?pli=1
number of moles
september exam
Quiz
. :
1.It’s the SI unit for the amount of substance, one mole of any substance contains 6.022×10²³ (avogardo’s number)
Because it helps them in dealing with extremely small particles like atom and molecule.
2.Atom is the smallest particle of an elementO
Molcule is a group of 2 or more atoms that are chemically bonded together and retains it’s Chem properties and it’s a covalent compound (exists in nature) O2
Formula unit it’s an ionic compound that exists in the form of a crystal lattice( exist in nature in ionic compund ) NaCl
(10²³×6.022× 2). 3.
1.204×10²⁴ atom
2×1.204×10²⁴
2.408×10²⁴ atom
.
page 2
page 1
.
home work….
we have explained the molar mass
We have explained an introduction to Chemistry and the concept of the Mole