ASC CHEM S.3

(i) Magnesium atom (Mg) S.3 CHEMISTRY DURATION: 2 hours (c) In the space provided below; draw the electronic structure and write electronic configuration of the following 1. (a) Define the following terms; (i) An atom ………………………………………………………………………………… ………………………………………………………………………………… (ii) Atomic number ………………………………………………………………………………… ………………………………………………………………………………… (iii) Ionic bond ………………………………………………………………………………… ………………………………………………………………………………… (iv) A cation ………………………………………………………………………………… ………………………………………………………………………………… END OF JULY TEST EXAM 2021 1 | P a g e ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… (ii) Use the diagram above to explain why the nucleus of an atom is positively charged ………………………………………………………………………………… ………………………………………………………………………………… TOPICS: ATOMIC STRUCTURE, BONDING, CARBON AND ITS COMPOUNDS. (b) (i) In the space below, draw a well labelled diagram of an atom, showing the location of the 3 fundamental particles (iii)Sodium ion (Na+) Atoms Electrons Protons Neutrons W 8 8 8 X 13 13 14 Y 16 16 16 z P 11 11 V 8 Q 16 a. Determine the value of; Atoms | Electrons | Protons | Neutrons | W | 8 | 8 | 8 | X | 13 | 13 | 14 | Y | 16 | 16 | 16 | z | P | 11 | 11 | V | 8 |