8th grade nc science chemistry
Quiz by Samuel Lahr
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12 questions
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- Q1Which of the following is a chemical change?Dissolving sugar in waterRusting of ironBoiling of waterMelting of ice30s
- Q2What is the main gas produced during photosynthesis?OxygenNitrogenHydrogenCarbon dioxide30s
- Q3What is the atomic number of carbon?12614830s
- Q4Which part of the atom contains protons and neutrons?OrbitalValence shellNucleusElectron cloud30s
- Q5Which of the following elements is a noble gas?HydrogenNitrogenNeonOxygen30s
- Q6What is the process by which a liquid turns into a gas?CondensationPrecipitationSublimationEvaporation30s
- Q7What is the boiling point of water at sea level in degrees Celsius?10020005030s
- Q8What is the atomic number of oxygen?81612630s
- Q9What do you call the number of protons in an atom's nucleus?Atomic numberValence numberMolecular weightMass number30s
- Q10Which of the following best describes an exothermic reaction?A reaction that produces gasA reaction that releases heatA reaction that absorbs heatA reaction that changes color30s
- Q11What is the chemical formula for table salt?CaCl2KClMgCl2NaCl30s
- Q12Which element is represented by the symbol 'O'?CarbonIronGoldOxygen30s