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