1. CHEMISTRY ABCTHE BASICS 2. SUB ATOMIC PARTICLESPROTONS
NEUTRONS ELECTRONS POSITIVE NONEGATIVE CHARGE CHARGE CHARGE+ 3.
ATOMIC NUMBERzMgAMASS NUMBER 4. 12 Mg24 5. A=Z+N 6. Number of
neutrons = 12 24 = 12 + N 7. WHY THEY LOOK ANDBEHAVE SO DIFFERENT
EVEN THOUGH THEY AREMADE OF THE SAME THREEBASIC PARTICLES? 8.
BECAUSE THE PHYSICAL AND CHEMICAL PROPERTIES DEPENDSUPON THE AMOUNT
OF THEM 9. 26 Fe56 10. 1H1 11. 6C12 12. 2He 4 13. How many? 92
U118192H 14. Daltons atomic theoryAtoms are the smallest They are
considered asand indivisible part ofbuilding block of matter.
matter. Any substanceEverything around us incomposed of only
singlethe universe is made uptype of atom constitutesof atom.an
element. 15. MODERN ATOMIC THEORY Atoms are divisible and
destructible.They are divisible into sub atomic particles such as
electrons, protons and neutrons. Atoms of the same element may not
beidentical in all respect. 16. Atomic ModelsRutherfordsAtomic
ModelBohrs AtomicModel 17. WHAT EXACTLY IS A METAL?CHEMICALLY
SPEAKING, I MEAN 18. Na M L K 19. Na 20. Just toremember:Z =
AtomicA = MassN = Number number numberof neutronsNumber ofNumber
ofprotons and protons neutrons 21. QPONMLKNUCLEUS 22. SHELLS HAVE
ORBITALS 23. 2 2 626 10SHELL K SHELL L SHELL M SHELL N SHELL O
SHELL P SHELL Q s sss s s s ppp p p pdd d d d f f f f 24. KNMLK 25.
Li L K 26. Rb O N M L K 27. Ca N M L K 28. Mg M L K 29. So, a Metal
is an element with few(1,2 or 3) electrons in its outermost shell.
30. A Non-Metal is an element with(5,6 or 7) electrons in its
outermost shell. 31. A Noble Gas is an element with 8 electrons in
its outermost shell. 32. Ar M L K 33. Cl M L K 34. FLK 35. Br N M L
K 36. HALOGENS 7AFCl BrI 37. The key concept in chemistryFA
property of anFratom respect to its tendency toattract electrons
38. OLK
