1) The silver element Ag is made up of: a) Ag atoms and H atoms b) Ag atoms and other metal atoms c) Ag atoms and O atoms d) only of Ag atoms 2) What is the definition of a compound? a) Made up of 2 or more elements chemically bonded b) Made up of 2 or more elements chemically bonded and in fixed proportion c) Made up of two or more elements d) Made up of elements that are chemically bonded 3) Which statement is false a) elements can never be broken down b) elements can sometimes be broken down c) elements is a pure substance 4) Is H2O a compound? a) Yes b) element c) Yes, and a molecule 5) What group is sodium Na in on the periodic table and why? a) Group 3, because it contains 3 valence electron b) Group 1 because it contains 1 valence electron c) Group 1 because it loses 1 electron d) Group 3 because it has similar properties to the other elements 6) Non metals are unable to conduct electricity and heat because? a) A solid b) It contains protons and electrons therefore unable to conduct electricity c) No free or delocalised electrons to conduct electricity d) It's reactive 7) Which of the following can be used to break down compounds? a) Filtration b) Distillation c) Electrolysis d) Liquid-liquid extraction 8) Which statement best explains compounds. a) The properties of the compounds are sometimes similar to its constituent elements b) The properties of compounds are always the same as its constituent elements c) The properties of compounds are different to its constituent elements d) The properties of an element changes in a compound 9) Which statement is true? a) There are 118 elements b) There are 118 compounds c) There are more than 9 million compounds d) There are more than 9 million elements 10) Which of the following is correct a) Oxygen is a molecule b) Oxygen is a compound c) Oxygen is an atom d) Oxygen is an element 11) Which statement(s) are false a) Metals are strong and dull b) Non metals have low density and dull c) Nonmetals are dull and weak d) Metals are strong and have low boiling points 12) Elements and compounds are forms of matter a) No b) Yes and no c) Yes d) Sometimes 13) NaCl can be broken down using which chemical process a) Electrolytes b) Chromatography c) Electrolysis d) Electricalytis

Compounds and Elements

由
嵌入

排行榜

視覺風格

選項

切換範本

恢復自動保存: ?