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