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