Unit 3 Science 8 - Density, Chemical Bonding, Laws of Conservation, Acids vs. Bases, Endo/Exothermic Reactions

mass

Mass is a measure of the amount of matter in an object, typically measured in grams or kilograms.

volume

Volume is the amount of space that an object occupies, usually measured in liters or cubic centimeters.

density

Density is the mass per unit volume of a substance, commonly expressed in grams per cubic centimeter or kilograms per liter.

How do you find density?

To find density, you divide mass/volume

How many types of chemical bonding are there?

2

ionic bonding

Ionic bonding is a type of chemical bond that occurs when atoms transfer electrons to achieve full outer electron shells, resulting in the formation of charged ions that attract each other.

Covalent Bonding

Covalent bonding is a type of bond in which they share valence electrons

law of Conservation

Matter cannot be created or destroyed, but can change form.

Subscript = number of ___

reactants

Coefficent = number of __

products

What is the arrow called?

yeilds

Lower pH solutions are….

strong acids

Higher pH solutions are…

bases

endothermic reaction

The absorption and release of energy, usually heat energy

exothermic reaction

The absorption of (heat) energy from the surroundings

What subatomic particle gives an ion its charge?

the electron

What do subscripts, like the one in H2O, represent

The number of hydrogen molecules 

What side are the reactants on in a chemical equation? 

right

Conservation of Matter

The law of conservation states that matter can not be created or destroyed, but matter can change form (physically and structurally)

Covalent bonds are between...

2 non-metals

Ionic bonds are between...

1 non-metal and 1 metal

What side are the products?

left 

  What do you call the arrow in a chemical equation?

yelids