Chemistry. Maegan harper

The first thing that were going to talk about is the Periodic Table.

red represents metals, yellow represents metalloids, and blue represents nonmetals. This shows where they are on the periodic table.

Protons, Neutrons, and Electrons all have different charges. The protons have a positive charge, the neutrons have a neutral charge, and electrons have a negative charge.

The father of the periodic table is Dmitri Mendeleev.

Next we will talk about the highest and lowest reactivity of elements. The most reactive nonmetal is Fluorine, and the least reactive noble gas is neon.

There are 18 groups and 7 periods on the periodic table.

Group 1: alkali metals.

Group 2: alkaline earth metals.

Group 11: coinage metals (not an IUPAC approved name)

Group 15: pnictogens (not an IUPAC approved name)

Group 16: chalcogens.

Group 17: halogens.

Group 18: noble gases.

Atomic Number, Atomic Mass, Mass Number

Each number tells the number of neutrons, number of electrons, and number of neutrons and electrons together.

Atomic number = # of protons & electrons

Atomic Mass = # of neutrons & protons

You know the number of electrons because they're the same number as the proton atoms

Atoms

This is an electron cloud and a nucleus.

Valence electrons are electrons that are associated with atoms.

2,8,8,8,8…. <--- pattern for drawing an atom

Balancing equations

List elements in the same order on each side

In a chemical equation the reactants are the beginning and the product is at the end.

Arrow = yield

6 CO2 + 6 H2O → C6H12O6 + 6 O2 (Example)

Example of how to balance an equation

Fe + _13_Cl2 =_12_ FeCl3

Fe-1 // Fe-1

C-12 * 13 = 156 // C-13 * 12 = 156

Chemical & physical properties & changes

Compare & contrast chemical & physical properties. Physical properties observe matter and chemical properties observe the change of substances. But they’re both observing two properties.

Compare & contrast chemical & physical changes. In a physical change the substance does not change, but in a chemical change the substance changes to a new substance.

What are the 5 signs of a chemical change?

Color change, formation of a precipitate, formation of a gas, unexpected temperature change, and light.

Credits:

Created with images by ost2 - "lab chemistry research"

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