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Chemistry
6th -
8thgrade
Unit 1 Structure and Properties of Matter
32 questions
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- 1. Multiple ChoiceHow many protons does this element have?26816
- 2. Multiple ChoiceA compound is:A substance that is composed of two or more elements that are chemically bonded.A molecule formed by atoms of the same element.another word for an atom.any substance that can be spit apart.
- 3. Multiple ChoiceAn element is made of one type ofatomcompoundmixturemolecule
- 4. Multiple ChoiceHow many electrons does this element have?16323p48
- 5. Multiple ChoiceElements that are found in the same group/family have the same number ofneutronsvalence electronsprotons and neutronsprotons
- 6. Multiple ChoiceElements that are found in the noble gases family (all the way to the right) allare gaseshave a full outer shell (valence) of electronsdon't like to react with other elementsAll of these choices
- 7. Multiple ChoiceHow many neutrons does this element have?9191710
- 8. Multiple ChoiceWhat is the atomic mass of this element (rounded to the nearest whole number)?27585932
- 9. Multiple ChoiceWhere are the protons in an atom?Orbiting the nucleusIn the nucleusAtoms don't have protons!
- 10. Multiple ChoiceWhere are the neutrons in an atom?Orbiting the nucleusIn the nucleusAtoms don't have protons!
- 11. Multiple ChoiceWhere are the electrons in an atom?Orbiting the nucleusIn the nucleusWhat's an electron?
- 12. Multiple ChoiceIn the carbon dioxide molecule below, what do the red spheres represent?chemical bondscarbon atomshydrogen atomsoxygen atoms
- 13. Multiple ChoiceSodium (Na) is an element, but sodium chloride (NaCl) is a compound. Why is NaCl a compound?It's not a compound. It's a molecule.It is made of 2 different elements (Na and Cl).It's made up of atoms.
- 14. Multiple ChoiceWhy do water molecules stick together?They have positively and negatively charged ends.They are wet.They don't. They repel each other.The ends have like charges.
- 15. Multiple ChoiceWhich of these is an element?WaterCarblonCarbon dioxideHydrogen
- 16. Multiple ChoiceWhich of these is a molecule?H2OCO2O2They all are!
- 17. Multiple ChoiceWhy do so many things dissolve in water?Water's strong charged ends attract and pull ions awayWater is wetWater molecules are movingI love water!
- 18. Multiple ChoiceHow many electrons does this element have?2040CalciumCa
- 19. Multiple ChoiceAll organic compounds haveCarbonHydrogenOxygenBoth Carbon and Hydrogen
- 20. Multiple ChoiceWhich of these is NOT a physical property of matter?MassVolumeDensityFlammability
- 21. Multiple ChoiceDensity is...the amount of mass in an objectthe amount of space an object takes uphow much matter is packed into an amount of spacethe weight of an object
- 22. Multiple ChoiceWhich of these is NOT a physical property of this apple?It is a red solid.It has a mass of 17 grams.It has a volume of 26 mL.It will react with oxygen in air if left out and turn brown.
- 23. Multiple ChoiceWhat are the white sticks in this picture?Hydrogen atomsChemical bondsOxygen atoms
- 24. Multiple ChoiceHow do you find out how many neutrons an element has?It's the same as the atomic number.Subtract the atomic number from the atomic mass (rounded).It's the same as the atomic mass.
- 25. Multiple ChoiceWhat is the chemical formula for water?H2OH2O2KClNaCl
- 26. Multiple ChoiceIn the molecule NaClO, how many different elements are needed ?2345
- 27. Multiple ChoiceHow many sulfur and oxygen atoms make up one molecule of the compound SO2?1 Sulfur, 1 Oxygen2 Sulfur, 1 Oxygen1 Sodium, 2 Oxygen1 Sulfur, 2 Oxygen
- 28. Multiple ChoiceIf the red atoms are Hydrogen and the blue atom is Carbon, and the picture shows a molecule of this compound, what is its chemical formula?CH3C4HCH4CH
- 29. Multiple ChoiceIf the red atom is Oxygen and the gray atoms are Hydrogen, what molecule is this?Carbon DioxideMethaneWaterSodium Chloride
- 30. Multiple ChoiceMolecules are2 atoms bound together2 elements bound together2 or more atoms mixed together2 or more atoms bound together
- 31. Multiple ChoiceWhich of the four following items is a compound?GoldHydrogenSaltNeon
- 32. Multiple ChoiceIn 2H2O, how many H2O molecules are present?1428
- Answer choicesTagsAnswer choicesTags