Chemistry Pre-test
Name:___________________________Baran ___
Answer True (T) or False {F) for the following questions:
T/F
1. Evaporation occurs when a liquid changes to a gas.
T
2. Sublimation occurs when a solid changes to a gas.
T
3. Condensation occurs when a gas changes to a solid.
F
4. A solute dissolves in a solvent.
T
5. A new substance doesn't form during a chemical change.
F
6. A chemical change that produces energy is endothermic.
F
7. Density is a physical property of a substance.
T
8. 1mL = 1cm3
T
9. The very simplest particles that make up matter are called atoms
T
10. Atoms of the same type usually group together to form compounds.
F
11. Metals tend to be shiny, malleable and ductile.
T
12. All the known elements and their symbols are in a table called the periodic table
T
13. The starting substance of a chemical reaction is called a product
F
14. Monoatomic elements exist as one atom.
T
15. Liquids that don't mix are said to be immiscible.
T
16. Alloys are a mixture of a metal with another metal or non-metal
T
17. The centre of the atom is the nucleus
T
18. The nucleus is made up of electrons and neutrons
T
19. The number of protons in an atom is the mass number
F
20. The number of neutrons in an atom is the atomic number
F
21. Electron shells surround the nucleus
T
22. There are 2 electrons in the first shell and 8 in the second
T
23. Atoms of the same element that have different number of neutrons are called isotopes
T
24. A charged atom is called an ion
T
25. An anion is a positive ion
26. The three main states of matter are solid, liquid and gas.
T
T
27. Viscosity is the rate of flow of a liquid only.
28. Diffusion is the rate of how fast a gas dissipates.
F
T
29. An example of continuous data is measuring someone's height.
30. The independent variable is the variable that is measured.
T
F
31. An example of discrete data is clothing size.
32. When graphing the independent variable is plotted on the x-axis and dependent plotted on
the y-axis.
T
T
33. In the gas phase particles are not close together while in a liquid and solid phase they are
packed in tightly into a matrix.
F