Years & Changes
The Periodic Table
Atomic Structure
Patterns
Equations
100
In 1869, what country discovered 63 more elements?
Russia
100
The Atomic Symbol 'K' represents which element?
Potassium
100
The outer most electrons are known as:
Valence Electrons
100
This structure looses electrons and become positively charged
Cations
100
In a chemical formula the subscript allows us to find:
Molecule number
200
Who gave us the periodic table we know today?
Henry Mosley
200
The Atomic Symbol 'O' represents which element?
Oxygen
200
In order for an atom to be stable, what number of valence electrons must it have?
8
200
These structures gain electrons and become negative. They are called:
Anions
200
Molecular Formula
300
True or False: The Periodic Table has remained the same throughout the years
False
300
The periodic table is broken up into three sections which are:
Metal, Non-metal, Semi-metals (metalloids)
300
Will an atom will 3 or less electrons gain or loose them?
Loose
300
The equation for photosynthesis is
c02 + H20 -> C6H1206
300
This type of formula is a model of:
Structural Formula
400
What did scientists believe made up matter before we discovered the atomic structure?
Invisible particles
400
How many groups make up the periodic table?
8
400
Will an atom will 5 or more electrons gain or loose them?
Gain
400
In photosynthesis carbon dioxide combines with:
Glucose
400
Empirical Formulas
500
True or False: The periodic table is used today
TRUE
500
How many periods are in the periodic table?
7
500
The center of the atom which holds all together is called:
Nucelous
500
This career uses the periodic table often
Chemistry teacher, Forensic Scientist, Lab Assistant, Medical Researchers, Pharmacologists
500
Valance electrons shared between atoms:
Covalent Bond