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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. 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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2. A 3D region around the nucleus that indicates the probable location of an electron.






3. A measure of the amount of matter






4. The number of protons in the nucleus of each atom of an element






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






6. A negative ion.






7. A value calculated by subtracting the experimental value from the accepted value - dividing the difference by the accepted value - and then multiplying by 100






8. The 14 elements with the atomic numbers 58-71.






9. Lowest energy state of an atom.






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






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






12. A pure substance made of only one kind of atom






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






14. A characteristic that can be observed or measured without changing the identity of the substance






15. A substance that reacts in a chemical change






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






17. A testable statement






18. A measure of the gravitational pull on matter






19. 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.






20. Distance between corresponding points on adjacent waves.






21. A change in a substance that does not involve a change in the identity of the substance






22. Combination of all the forms of electromagnetic radiation.






23. A vertical column of the periodic table






24. States that it is impossible to determine simultaneously both the position and velocity of an electron or any other particle.






25. Atoms of the same element that have different masses






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






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






28. Minimum quantity of energy that can be lost or gained by an atom.






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






30. A short-range proton-neutron - proton-proton - or neutrorce that holds the nuclear particles together






31. The general term for any isotope of any element






32. The elements of group 2 of the periodic table.






33. A horizontal row of elements in the periodic table






34. Number of waves that pass a given point in a specific time - usually one second.






35. A property that depends on the amount of matter that is present






36. The measurement system accepted worldwide

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






38. Not having a uniform composition throughout






39. The mass of one mole of a pure substance






40. 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






41. The energy change that occurs when an electron is acquired by a neutral atom.






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






43. Specify the properties of atomic orbitals and the properties of electrons in orbitals.






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






45. Mass is neither created nor destroyed duringordinary chemical or physical reactions






46. The energy required to remove one electron from a neutral atom of an element.






47. The weighted average of the atomic masses of thenaturally occurring isotopes of an element






48. Any substance that has a definite composition






49. A logical approach to solving problems by observing and collecting data - formulating hypotheses - testing hypotheses - and formulating theories that are supported by data






50. An element that is a good conductor of heat and electricity