Chem Flashcards
(34 cards)
What is a physical change?
A physical change in matter that does not affect the chemical properties of matter
What is Quantitative data?
Quantitative data are data represented numerically, including anything that can be counted, measured, or given a numerical value.
(Examples: Cost of a car, height of a building, and weight of an apple)
What is Qualitative data?
Qualitative data are data representing information and concepts that are not represented by numbers.
(Examples: Your gender, most popular brand of shoes, sour pickles and the colour of flowers)
What is a homogenous mixture?
A homogenous mixture means 2 of the same. Meaning you can not see the difference in the mixture.
What is a chemical change?
A material changing into a new material with different properties
What is a heterogeneous mixture?
A heterogeneous mixture means 2 different. Meaning you can see different parts of the mixture easily.
What are the six changes of state?
Solidification, Sublimation, condensation, evaporation, deposition and melting
How do gas particles move?
Gas particles move quickly and randomly
What does Solidification mean?
the process of becoming solid or making something solid.
How do liquid particles move?
Liquid particles move around each other.
What does sublimation mean?
conversion of a substance from the solid to the gaseous state without its becoming liquid.
How do solid particles move?
Solid particles vibrate in place
What is a pure substance?
A pure substance is made of just one thing, so it can not be broken down
What does condensation mean?
when water turns from vapour to liquid
If you have the mass and volume, how do you calculate the density?
To find the density you divide the mass by the volume
What does evaporation mean?
Evaporation is the process by which water changes from a liquid to a gas or vapor.
If you have the mass and density, how do you calculate the volume?
To find the volume you divide the mass by the density
what does deposition mean?
Deposition is when a substance in gas form changes states to become a solid.
If you have the volume and density, how do you calculate the mass?
To find the mass you multiply the density by the volume
What does melting mean?
melting, the change of a solid into a liquid when heat is applied.
What are the different parts of an atom
nucleus, protons, electrons, neutrons
Name lab equipment we used. (Hint: There are 7)
- Test-tube rack
- Ring stand
- Test tubes
- Beaker
- Erlenmeyer flask
- Rubber stoppers
- pipestem triangle
What is the charge of protons?
Protons have a positive electrical charge of one (+1) . 1 amu
what is the charge of electrons?
An electron has a charge of −1 1/1836th of 1.66x10
