number of protons number of electrons A B C 15 17
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1 1 The table gives the composition of three s. A B C (a) What is the evidence in the table for each of the following? (i) Particle A is an atom. [1] (ii) A, B and C are all s of the same element. [1] (iii) Particles A and C are isotopes of the same element. [2] (b) (i) What is the electronic structure of A? [1] (ii) Is element A, a metal or a non-metal? Give a reason for your choice. [1] [Total: 6]
2 2 Protons, and are subatomic s. (a) Complete the table to show the relative mass and relative charge of a proton, a neutron and an electron. relative mass relative charge proton neutron electron [3] (b) Bromine has two isotopes. (i) Define the term isotope. (ii) Explain why the two isotopes of bromine have the same chemical properties. (c) The table shows the, and in some atoms and ions. Complete the table. 7 3Li S [5] [Total: 12]
3 3 (a) (i) De ine the term atomic number.... [1] (ii) Define the term nucleon number. (b) The table shows the, and in some atoms or ions. Complete the table. The first line is given as an example. symbol or formula A C B C O 2- D [6] [Total: 9]
4 4 (a) The table below gives information about s. Complete the table. The first line has been done for you. electronic configuration charge on A ,8 2+ B 18 2,8,8 1 C 18 2,8,8 0 D 8 10 [4] (b) Gallium is a Group III element. Define the term element.. [1] (c) The following are gallium atoms. Complete the following table. 69 Ga 71 Ga atom 69 Ga Ga 31 [3] [Total: 8]
5 5 (a) The symbols of six s are shown below. Na + Ca 2+ Kr P Si O 2 Select from the list of s to answer the following questions. A may be selected once, more than once or not at all. (i) Which two ions have the same electronic structure?... [1] (ii) Which ion has the same electronic structure as an atom of argon?... [1] (iii) Which atom can form an ion of the type X 3?... [1] (iv) Which atom can form a hydride which has a formula of the type XH 4?... [1] (b) (i) How many, and are there in one copper(ii) ion Cu 2+? [2] (ii) Sc represents an atom of scandium. How many nucleons and how many charged s are there in one atom of scandium? nucleons... charged s... [2] (c) Two different atoms of sodium are Na and 4 1 1Na. (i) Explain why these two atoms are isotopes. (ii) Na is radioactive. It changes into an atom of a different element which has one more proton. Identify this element.... [1] (iii) State two uses of radioactive isotopes. [Total: 13]
6 6 Complete the following table which gives the, and in each of the fi ve s Fe Ga [Total: 8]
7 7 (a)definetheterm isotope.. [2] (b) The table gives information about four s, A, B, C and D. Complete the table. The fi rst line has been done for you. number of number of number of nucleon number symbol or formula A C B C 8 8 O D Al 3+ [7] [Total: 9]
8 8 The table below gives the composition of six s which are either atoms or ions. A B C D E F (a) Which s are atoms? Explain your choice.. [2] (b) Which is a negative ion and why has this got a negative charge?. [2] (c) Which s are positive ions?. [1] (d) Explain why A and D are isotopes.. [2] [Total: 7]
of electrons 2) ) ) )
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Unit 3: The Atom Part 1. DUE: Friday October 13, 2017
Unit 3: The Atom Part 1 The following pages are practice questions for this unit, and will be submitted for homework! You must complete: What is in an atom? ALL QUESTIONS Calculating the Number of Protons,