Chemistry Chapter 1

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What is Matter?

anything with mass that takes up space

What is substance?

a specific type of pure matter

What are physical properties?

a character of a substance that can be observed without change

What are chemical properties?

a characteristic that describes its ability to change

Examples of physical properties:

able to melt, able to be broken into smaller parts

Examples of chemical properties:

can burn, can dissolve solids

What is matter made of?

different elements

What are elements?

a substance that cannot be broken down into and other substances by chemical or physical means

What are atoms?

a basic particle from which all elements are made of

What are the three main parts of an atom?

Protons, electrons, nucleus

What is a chemical bond?

a force of attraction between two atoms

What is a molecule?

a group of two or more atoms

What is a compound ?

a substance made of two or more elements

What are mixtures?

a mixture made of two or more substances that are together in the same place but not chemically bonded

What is a heterogeneous mixture?

a mixture where you can see the separate substances and is easily separated

What does hetero mean?

Different

What is a homogeneous mixture?

two substances have chemically bonded and you cannot see the different parts of the mixture

What does homo mean?

same

Why is separating mixtures possible?

because substances in mixtures keep there properties

What are the four methods of separation?

distillation, evaporation, filtration, magnetic attraction

What is weight?

the measure of force of gravity on you or the object

What is the formula to find the weight of something?

massX9.8

What is mass?

amount the matter in an object

What is the SI unit for mass?

kg

What is volume?

the amount of space matter occupies per cm cubed

How is volume measured?

LengthXwidthXheight or by putting an object in a container of water and see how much the water rises.

What is density?

Measure of mass of a material in a given object

What is the formula for density?

Mass divided by volume

What does a physical change do to an object?

it changes it's appearance

What are the three states of matter?

solid, liquid, gas

What does a chemical change do to an object?

its transforms one substance into another

What is the Law of Conservation of Matter?

matter is not created nor destroyed in a chemical change

What is the Law of Conservation of Energy?

energy is not created nor destroyed, it just changes form

What is temperature?

how hot or cold something is

What is thermal energy?

total energy of the motion of all of the particles in an object

What is Endothermic?

cold

What is exothermic change?

warm

What is Chemical energy?

the energy stored in the chemical bonds between atoms

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