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