EXAM OF PHYSICS AND CHEMISTRY. 2nd ESO B&C Name: _________________________________ Group: _________ Date: _________ Question 1 Say the name, in what part of the atom they are and the charge of the main three a) (0.5 points) particles that form the atom. Draw a picture of an atom, indicating these three particles. Define: b)(0.4 points) neutral atom ion Say the name and define the two types of ions. c) (0.4 points) Complete the table: d) (1.2 points ) Symbol Z A Nº protons Nº neutrons Nº electrons F 19 9 7 7 P 31 15 K+ 19 20 From the table above, say which atoms are neutral, which are ions and which e) (0.5 points) types of ion they are. Question 2 (2 points; 0.5 points each letter) For each of the following atoms, say their number of protons, number of neutrons and a) number of electrons: [Note: the letters A, B, C, D, E, F and G don´t represent the real symbol of the element]
EXAM OF PHYSICS AND CHEMISTRY. 2nd ESO B&C Name: _________________________________ Group: _________ Date: _________ Question 1 a) (0.5 points) Say the name, in what part of the atom they are and the charge of the main three particles that form the atom. Draw a picture of an atom, indicating these three particles. b)(0.4 points) Define: neutral atom ion c) (0.4 points) Say the name and define the two types of ions. d) (1.2 points ) Complete the table: Symbol Z A Nº protons Nº neutrons Nº electrons F 19 9 7 7 P 31 15 K+ 19 20 e) (0.5 points) From the table above, say which atoms are neutral, which are ions and which types of ion they are. Question 2 (2 points; 0.5 points each letter) a) For each of the following atoms, say their number of protons, number of neutrons and number of electrons: [Note: the letters A, B, C, D, E, F and G don´t represent the real symbol of the element]