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