Chemistry 130, lesson 4-5

1. How many elements are in the first period of the periodic table?   2
2. What are the elements in Group 7A of the periodic table called? halogens
3. Malleability is a characteristic of metals
4. Which of the following is a group of all non-metals? F, Cl, Br, Kr
5. Which of the following particles is normally found outside the nucleus of the atom? electron
6. If an atom contains 37 protons, what is the identity of the element? Rb
7. Two atoms are isotopes if they contain the same number of protons but different numbers of neutrons
8.  The symbol 19,9F indicates a fluorine atom that contains 9 protons and 10 neutrons
9.What is the atomic mass of sodium? 22.99 amu
10. When Group 2A is part of an ionic compound or bond what is its charge? +2
11. How many valence electrons does an atom of oxygen have? 6.
12. On which energy level are the valence electrons of carbon? 2nd
13. What will be the most common ion of phosphorus? -3
14. Ionic compounds are normally electrically charged
15. How does a covalent bond differ from an ionic bond? an ionic bond is the transfer of electrons and a covalent bond is a sharing of electrons
16. What is the name of the compound whose formula is (NH4)3PO4? ammonium phosphate
17. What is the name of the compound whose formula is Na2O? sodium oxide
18. What is the name of CaCl2? calcium chloride
19. What is the name of Na2SO4? sodium sulfate
20. What is the formula for the molecule triphosphorus monoxide? P3O
21. What is the formula for copper(II) oxide? CuO
22. What is the name of the molecular substance PCl5? phosphorus pentachloride
23. What is the name of the compound whose formula is N2O4? dinitrogen tetroxide
24. Which of the following is a transition metal? Pick one: Sc
25. Covalent bonding occurs between two nonmetals


valentin68

Leave a Reply