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CLASS TEST NAME ________________________________________ Class IIB Date __________ 1 .Which atomic particles will you find inside of the nucleus of an atom? ______________________________________________________________ 2. Which atomic particle has a negative charge? ___________________________________________ 3.An electron has a mass that is much more than a proton. a. True b. False 4. Can any electron only be found in one of the seven possible atomic shells? _______________________________________________________________________________ 5 . An atom with a neutral charge has the same number of______________________________________________________________ 6. There is no particle of matter smaller than an atom. a. True b. False 7. Atoms of an element may have more or less neutrons or electrons than other atoms of the same element. a. True b. False 8. When atoms bond with each other, they exchange___________________________________________________ 9. _______________________________________ are atoms of the same element that have different numbers of neutrons. 10.The atomic number of an element tells you the number of _________________________________________. 11. An ion is a form of an atom with a different number of_____________________________________________ 12. Molecules are always in ______________________ 13. Do Atoms in the same family of elements on the periodic table share similar characteristics? ______________________________________________________________________________________ 14. What is the first element on the periodic table? ______________________________________________________________________________________________ 15. If an atom has 13 electrons, how many shells will have electrons? ____________________________________________________________________________________ 16. About how many known elements are there? _______________________________________________________________________________________ 17. Elements in the periodic table are arranged by________________________________ 18. Which nineteenth century scientist combined the idea of elements with the Greek theory of the atom? a. Isaac Newton b. John Dalton c. J. J. Thomson d. Ernest Rutherford 1 19. What distinguishes atoms of different elements? a. number of protons plus neutrons b. number of neutrons c. number of electrons d. number of protons in an element’s nucleus 20. Draw fully labelled diagrams of the atoms below: a. 27Al 13 b. 40 Ca 20 21. The electrons ______________________________________________________ around the nucleus in shells. The first shell, which is _______________________________ the nucleus, can hold ________electrons, whereas the 2nd and 3rd shells can hold ______________electrons. 22 A compound is a substance formed when ______________ or _________________ types of elements are ____________________ joined. 23 ______________________________ are two or more substances that are mixed together but not chemically joined. 24.What is the most well-known chemical formula in the world ? _____________________________________. 25. What electrical charge has a single proton? ______________________________________________________________________________________________________ 26 Which particles have approximately the same size and mass as each other? a. neutrons and electrons b. electrons and protons c. protons and neutrons 2
