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