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