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Pre - AP Chemistry

Subjects : pre-ap, science
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Minimum quantity of energy that can be lost or gained by an atom.






2. A substance that is made from the atoms of two or more elements that are chemically bonded






3. 1/2 the distance between the nuclei of identical atoms that are bonded together.






4. Orbitals of equal energy are each occupied by one electron before any orbital is occupied by a second electron - and all electrons in singly occupied orbitals must have the same spin state.

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5. An atom or group of bonded atoms that has a positive or negative charge.






6. A substance that has a fixed composition and differs from a mixture in that every sample of a given pure substance has exactly the same characteristic properties and composition






7. A testable statement






8. Anything that has mass and takes up space






9. A unit of mass that is exactly 1/12 the mass of a carbon-12atom - or 1.660 540 × 10-27 kg






10. The elements of group 1 of the periodic table.






11. A chemical compound contains the same elementsin exactly the same proportions by mass regardless of the size of the sample orthe source of the compound






12. An element that is a poor conductor of heat and electricity






13. A positive ion.






14. An electron occupies the lowest-energy orbital that can receive it






15. A measure of the ability of an atom in a chemical compound to attract electrons from another atom in the compound.






16. The measurement system accepted worldwide

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17. A blend of two or more kinds of matter - each of which retains its own identity and properties






18. Which suborbital. (Py - Px - Pz)






19. A unit that is a combination of SI base units






20. The total number of protons and neutrons in the nucleus of an isotope






21. A substance that is formed by a chemical change






22. The ratio of mass to volume or mass divided by volume






23. A horizontal row of elements in the periodic table






24. The state of matter in which the substance has definite volume and definite shape






25. A vertical column of the periodic table






26. Combination of all the forms of electromagnetic radiation.






27. An outer main energy level occupied - in most cases - by 8 electrons






28. State in which an atom has a higher potential energy than it has in it's ground state.






29. The smallest unit of an element that maintains the properties of that element






30. An arrangement of the elements in order of their atomic numbers so that the elements with similar properties fall in the same column or group.






31. The state of matter in which a substance has neither definite volume nor definite shape






32. 6.022 1367 × 1023; the number of particles in exactly onemole of a pure substance

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33. Any process that results in the formation of an ion.






34. The state of matter in which the substance has a definite volume but an indefinite shape






35. A ratio derived from the equality between two different units that can be used to convert from one unit to the other






36. The electrons available to be lost - gained - or shared in the formation of chemical compounds.






37. The suborbitals of an atom. (S - P - D - F)






38. A high-temperature physical state of matter in which atoms lose their electrons






39. Having a uniform composition throughout






40. Two quantities that give a constant value when one is divided by the other






41. The p-block elements together with the s-block elements.






42. The amount of space occupied by an object






43. Particle of electromagnetic radiation having zero mass and carrying a quantum of energy.






44. A measure of the amount of matter






45. A broad generalization that explains a body of facts or phenomena






46. The closeness of measurements to the correct or accepted value of the quantity measured






47. Describes mathematically the wave properties of electrons and other very small particles.






48. The amount of a substance that contains as many particles as there areatoms in exactly 12 g of carbon-12






49. Any digit in a measurement that is known with certainty plus one final digit - which is somewhat uncertain or is estimated






50. Any substance that has a definite composition