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