Carbon has atomic number 6. How many protons does a carbon atom have?, 3, 6, 12, 18, Carbon has 6 protons and is neutral. How many electrons does it have?, 12, 7, 3, 6, An atom has 8 protons and 10 neutrons. What is its mass number?, 18, 8, 10, 2, Sodium has atomic number 11 and mass number 23. How many neutrons does it have?, 23, 34, 12, 11, An atom has 12 protons, 12 neutrons and 12 electrons. What is its mass number?, 36, 24, 12, 0, An atom has 17 protons and 17 electrons. What is its overall charge?, Negative, Positive, 17−, Neutral, An atom has electron arrangement 2,8,1. How many electrons does it have altogether?, 11, 18, 10, 8, An atom has electron arrangement 2,8,2. How many outer-shell electrons does it have?, 10, 12, 2, 8, Which is the electron arrangement of oxygen, which has 8 electrons?, 4,4, 2,8, 2,6, 8,2, Chlorine has electron arrangement 2,8,7. What will it most easily do?, Lose all its electrons, Gain 7 electrons, Lose 7 electrons, Gain 1 electron, A sodium atom loses one electron. What ion forms?, Na²⁺, Na⁺, Na⁻, Na²⁻, Chlorine gains one electron. What ion forms?, Cl⁻, Cl²⁺, Cl²⁻, Cl⁺, Magnesium loses TWO electrons. What charge does it have?, 1+, 2−, 1−, 2+, Oxygen gains TWO electrons. What ion does it form?, O²⁻, O²⁺, O⁺, O⁻, Sodium transfers an electron to chlorine. What type of bond forms?, Neutral, Covalent, Ionic, No bond, Two oxygen atoms share electrons. What type of bonding is this?, No bonding, Covalent, Neutralisation, Ionic, Which pair is most likely to form an ionic compound?, Carbon + oxygen, Oxygen + hydrogen, Sodium + chlorine, Hydrogen + chlorine, Which pair will form covalent bonds?, Sodium + chlorine, Magnesium + oxygen, Potassium + chlorine, Carbon + oxygen, Sara tests a solution and finds its pH is 3. The solution is:, Acidic, A metal, Neutral, Alkaline, Ali’s solution has pH 11. It is:, Acidic, Alkaline, A gas, Neutral, Which is MORE acidic?, pH 2, pH 10, pH 5, pH 7, Hydrochloric acid reacts with sodium hydroxide. This is called:, Combustion, Filtration, Evaporation, Neutralisation, Magnesium is added to hydrochloric acid. Which gas should be produced?, Nitrogen, Hydrogen, Oxygen, Chlorine, Dalia mixes sand with water. The sand does not dissolve. What should she use?, Chromatography, Melting, Filtration, Crystallisation, After filtration, where will the sand be?, Turned into gas, On the filter paper as the residue, Dissolved in the water, Inside the measuring cylinder only, Dalia wants to separate the colours contained in black ink. What should she use?, Sieving, Filtration, Crystallisation, Chromatography, Two identical reactions are performed at 20°C and 40°C. Which should be faster?, 40°C reaction, Neither reaction, 20°C reaction, They must be identical, Dalia has two equal masses of marble. One is a large piece and the other is crushed into powder. Which reacts faster with acid?, Neither, Large piece, Powder, Both must react at exactly the same rate, What does a catalyst do?, Makes atoms disappear, Speeds up a reaction without being used up overall, Changes all substances into acids, Stops every reaction, A reaction starts at 22°C and rises to 36°C. What type of reaction is it?, Neutral, Endothermic, Physical separation, Exothermic

Set 4

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تضمين

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