1. 2 nucleus 1 3 4

2. A TOMIC STRUCTURE 4 Atomic mass 2 Atomic number number of electrons number of protons The sum of protons and neutrons in an atom Number of Protons in an atom number of neutrons Atomic mass Atomic number Atomic mass proton Atomic mass electron

3. 2 E LECTRONIC C ONFIGURATION the arrangement of the electron in the atom. Electrons are arranged in Energy Levels or Shells around the nucleus of an atom. nucleus 1 3 4 s d f s p s p d p s Atomic orbital f = 7 d = 5 p = 3 s = 1 1 Atomic orbital = 2 e - x 2 = 2 x 2 = 6 x 2 = 10 x 2 = 14 2e - 8e - 32e - Main energy level Sub energy level no.of electrons 18e -

4. Given the Element 13 27 Complete the missing data. p+p+ e-e- n0n0 Number of Location in the atom 1) 2) 3) 4) 5) 6)

5. 7. The maximum number of electrons that can be contained in an atomic orbital is 8. The particles in an atomic nucleus are collectively known as _______ Multiple choice a. 2 a. Nucleus c. Nucleolus b. Nucleons b. 8 c. 6

6. 9. There are __ orbitals in the 3 rd energy level. 10. The total number of electrons in the 4 th energy level a. 10 b. 16 c. 3 a. 36 b. 28 c. 32

7. Given the Element 13 27 Complete the missing data. p+p+ e-e- n0n0 Number of Location in the atom 1) 2) 3) 4) 5) 6) 13 14 Inside the nucleus Inside the nucleus Electron cloud

8. a. Nucleus c. Nucleolus 7. The maximum number of electrons that can be contained in an atomic orbital is 8. The particles in an atomic nucleus are collectively known as _______ Multiple choice b. 8 c. 6 b. Nucleons a. 2

9. 9. There are a total of __ orbitals in the 3 rd energy level. 10. The total number of electrons in the 4 th energy level b. 16 c. 3 c. 32 a. 10 a. 36 b. 28

10. Please don’t forget to bring your copy of the periodic table tomorrow

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