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Test your basic knowledge |
Basic Chemistry
Start Test
Study First
Subjects
:
science
,
chemistry
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. A pure substance that cannot be broken down into other substances by chemical reactions
single bond
ion
molecule
element
2. Atoms that have lost or gained electrons
radioactive isotope
ion
matter
inorganic compound
3. Shows the number and types of atoms in a molecule and how they are arranged
structural formula
chemical formula
valence electrons
atomic number
4. The smallest particle of an element that retains the properties of the element
element
atom
compound
chemical formula
5. Indicates the number and types of atoms in a molecule
element
chemical formula
neutron
ion
6. Atoms having the same numbers of protons but different numbers of neutrons
chemical reaction
double bond
isotope
neutron
7. Substance made of two or more elements & one being carbon
organic compound
ionic bond
nucleus
molecule
8. Atoms that have lost or gained electrons
inorganic compound
proton
ion
atom
9. Substance made of two or more elements & none of which is carbon
inorganic compound
element
radioactive isotope
organic compound
10. The starting materials for a reaction; found on left side of chemical equation
matter
single bond
reactant
structural formula
11. Indicates the formation of new substances from previous substances
atom
chemical reaction
proton
valence electrons
12. Subatomic particle without a charge; found in nucleus
organic compound
neutron
radioactive isotope
electron
13. A pure substance that cannot be broken down into other substances by chemical reactions
valence electrons
element
compound
isotope
14. A covalent bond in which four valence electrons are shared between two atoms
double bond
chemical reaction
isotope
neutron
15. Atoms having the same numbers of protons but different numbers of neutrons
isotope
organic compound
ion
atom
16. A covalent bond in which four valence electrons are shared between two atoms
ionic bond
structural formula
double bond
single bond
17. Substance containing two or more elements chemically combined in a fixed ratio
isotope
chemical formula
nucleus
compound
18. Protons and neutrons together; make up the center of an atom
nucleus
compound
atomic number
matter
19. Electrons in the outermost energy level; they are involved in bond formation
covalent bond
valence electrons
electron
inorganic compound
20. An unstable atom in which the nucleus decays (breaks down) releasing particles and energy
ionic bond
radioactive isotope
atom
atom
21. Indicates the number and types of atoms in a molecule
matter
chemical formula
electron
chemical reaction
22. Substance made of two or more elements & one being carbon
compound
neutron
nucleus
organic compound
23. Identifies a specific element; equals the number of protons in an atom of each element
atomic number
chemical reaction
electron
double bond
24. Atoms that are held together by covalent bonds
chemical reaction
molecule
chemical reaction
valence electrons
25. Interaction of substances that lead to the formation of new substances
molecule
chemical reaction
covalent bond
ionic bond
26. An unstable atom in which the nucleus decays (breaks down) releasing particles and energy
molecule
nucleus
radioactive isotope
ionic bond
27. Subatomic particle having a negative charge; not in nucleus but surrounds it
chemical formula
single bond
reactant
electron
28. Ending materials of a reaction; found on right side of chemical equation
matter
nucleus
product
atomic number
29. Subatomic particle having a negative charge; not in nucleus but surrounds it
atomic number
chemical formula
electron
neutron
30. A covalent bond in which one pair of electrons is shared
neutron
chemical formula
single bond
nucleus
31. Shows the number and types of atoms in a molecule and how they are arranged
nucleus
covalent bond
ionic bond
structural formula
32. Interaction of substances that lead to the formation of new substances
product
matter
chemical reaction
isotope
33. Ending materials of a reaction; found on right side of chemical equation
matter
covalent bond
product
compound
34. Subatomic particle without a charge; found in nucleus
chemical reaction
chemical reaction
neutron
organic compound
35. Occurs when atoms transfer electrons to other atoms
single bond
ionic bond
reactant
compound
36. The starting materials for a reaction; found on left side of chemical equation
product
product
reactant
element
37. Anything that occupies space and has mass
single bond
matter
electron
isotope
38. Occurs when atoms transfer electrons to other atoms
product
electron
ionic bond
atom
39. The smallest particle of an element that retains the properties of the element
atom
element
double bond
structural formula
40. A covalent bond in which one pair of electrons is shared
compound
reactant
chemical formula
single bond
41. Substance containing two or more elements chemically combined in a fixed ratio
matter
reactant
radioactive isotope
compound
42. Identifies a specific element; equals the number of protons in an atom of each element
ionic bond
atomic number
radioactive isotope
neutron
43. Atoms that are held together by covalent bonds
single bond
compound
molecule
proton
44. Electrons in the outermost energy level; they are involved in bond formation
chemical reaction
element
valence electrons
reactant
45. Protons and neutrons together; make up the center of an atom
reactant
inorganic compound
organic compound
nucleus
46. Occurs when atoms share electrons
element
covalent bond
double bond
compound
47. Occurs when atoms share electrons
isotope
chemical formula
covalent bond
element
48. Subatomic particle having a positive charge; found in nucleus
proton
ionic bond
covalent bond
matter
49. Subatomic particle having a positive charge; found in nucleus
inorganic compound
isotope
proton
structural formula
50. Indicates the formation of new substances from previous substances
electron
molecule
chemical reaction
product