Flashcards
Quizz 3
Flashcards do conjunto (20)
- 1According to Dalton's theory, elements: A) are always solids B) contain only one kind of atom C) can be split up into simpler substances D) contain at least two different kinds of atomB) contain only one kind of atom
- 2Which of these diagrams shows the particles in a compound?C
- 3When magnesium ribbon reacts with steam a solid called magnesium oxide and hydrogen gas are formed. Which of the following completes the word equation for this reaction : magnesium + ______—>_______ +_______ A) hydrogen —> magnesium + water B) water —> magnesium oxide + hydrogen C) water —> magnesium + hydrogen D) magnesium oxide —> hydrogen + waterB) water —> magnesium oxide + hydrogen
- 44 The correct symbol for iron is A) I B) Ir C) Fe D) feC) Fe
- 5Which of the following always happens during a chemical reaction? A) Compounds react and split up into free atoms B) Elements join together to make new elements C) Atoms are broken down into smaller particles D)The atoms in the reactants are rearranged to make the productsD)The atoms in the reactants are rearranged to make the products
- 6Which of the following is a chemical change?A)
- 7The main difference between a chemical change and a physical change is that in a chemical change you always get A) a change of state B) heat given out C) a change in colour D) a new substance being formedD) a new substance being formed
- 8—A) and B)
- 9Which two elements in the periodic table below would have the most similar chemical properties?C) 1 & 6
- 10Which element is very unreactive? Why? A) helium B) lithium C) hydrogen D) fluorineA) helium. Because it is a noble gas
- 11Which of the following describes a group 1 element? Why? A) a very reactive metal B) a very unreactive metal C) a very reactive nonmetal D) a very unreactive non-metalA) a very reactive metal. Because Group 1 elements are alkali metals.
- 12The elements were arranged in the periodic table in order of increasing: A) density C) melting point B) reactivity D) masses of atomsD) masses of atoms
- 13Where are most non-metals found in the periodic table?D)
- 14Which of the following substances will be a liquid at 350 °C?
- 15Which list contains three typical properties of non-metals? A) good conductor of heat, brittle, low melting point B) good conductor of electricity, strong, high melting point C) poor conductor of heat, strong, high melting point D) poor conductor of electricity, weak, low melting pointD) poor conductor of electricity, weak, low melting point
- 16—C) increases down the group.
- 17When magnesium is heated and reacts with oxygen gas... A) it glows red and forms magnesium oxide gas. B) it burns brightly and forms magnesium oxide gas C) it glows red and forms solid white magnesium oxide D) it burns brightly and forms solid white magnesium oxideD) it burns brightly and forms solid white magnesium oxide
- 18Compared to sulfur dioxide, lithium oxide is likely to have... A) a lower melting point and higher pH B) a higher melting point and higher pH C) a higher melting point and lower pH D) a lower melting point and lower pHD) a lower melting point and lower pH
- 19In which of the following pairs of elements is the second element more reactive than the first element? A) sodium and potassium B) sodium and lithium C) chlorine and bromine D) fluorine and chlorineB) sodium and lithium
- 20Astatine is a very rare element found at the bottom of group 7. Astatine is likely to be: A) a non-metal gas that is very unreactive B) a metal that reacts with water C) a metal that does not react easily D) a non-metal that reacts with metalsD) a non-metal that reacts with metals
Informações
- Descrição
- Year 8 Science (PERIODIC TABLE) FlashCards sobre Quizz 3, criado por Carmen Allende em 23-02-2017.
- Criado por
- Carmen Allende
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