CHEMISTRY FINAL TEST - Elemental Encephalon Eradication

Different types of atoms are called?

Different types of atoms are called?

Elements

How many elements are there?

118

How many elements are naturally occuring?

94

What are the rows of X & Y?

Groups and Periods

Find Ruthenium and mark it’s group and period

Transition Elements, Period 5

What are the properties of an Element?

Pure Substance, 1 type of atom, Chemically joined together

Ex: O, O2, H2

What are the properties of a Compound?

Pure Substance, 2 type of atom, Chemically joined together

Ex: H2O (Water), CO2, C6H12O6 (Glucose)

What are the properties of a Mixture?

Mix of Elements or Compounds, Physically joined together

Examples of Mixture?

Element + Element = Alloy (Fe+Al+Co)
Element + Compound = Air (O2+Co2+N2)
Compound + Compound = Salt Solution (NaCl + H2O)

What’s the mass of Proton, Neutron & Electron?

P = 1
N = 1
E = 0

What’s the charge of Proton, Neutron & Electron?

P = +
N = Neutral
E = -

Proton and Neutron are packed together in a _____________

Nucleus

Where are electrons placed at in the atom?

They are in the shell.

Why do atoms have no charge?

Proton (+) and Electron (-) are always in the same amount so they cancel each other out.

What is another name for Atomic Number?

Proton Number

What is another name for Atomic Weight?

Nucleon Number

In the periodic table, you might see a configuration like this, label X, Y and Z

X = Symbol
Y = Atomic Weight
Z = Atomic Numbre

How do you find the electronic configuration?

Why do some elements go 2, 8, 8, 2. Why not 2, 8, 10?

The last outer shell cannot have more electrons then the previous

What is the correlation between electronic configuration and group, period number?

The last number is always the group number

The amount of shells is the period number

Why are Group VIII elements special?

They have a full outer shell making them unreactive