The Periodic Table Flashcards
Appearance of iron fillings
Grey solid
Appearance of iron fillings with magnets
Moves
Appearance of sulfur
Yellow solid
Appearance of sulfur with magnets
No movement
Appearance of iron and sulfur mixture
Green solid with yellow specs
Appearance of iron and sulfur mixture with magnets
Moves
Appearance of iron (2) sulfide
Black solid
Appearance of iron (2) sulfide with magnets
No movement
what is an element
A substance that consists of only one type of atom
Liquids on the periodic table
Bromine and mercury
Gases on the periodic table (6)
- hydrogen
- nitrogen
- oxygen
- chlorine
- fluorine
- noble gases
What are the other elements other than liquids and gases
Solids at room temperature and pressure
4 physical properties of metals
- good conductors of electricity
- lustrous, have a shiny surface when freshly cut
- high melting points (group 1 metals have low melting points)
- sonorous
4 physical properties of non-metals
- electrical insulators (except graphite)
- are often dull when freshly cut
- brittle
- poor conductors of heat
What is an atom
The smallest part of an element that can exist
What is a compound
A substance consisting of two or more different elements, which are chemically combined
What is a molecule
A particle that consists of two or more atoms covalently bonded together
Describe the layout of mendeleeves periodic table
In order of their increasing mass (elements) numbers but left gaps for undiscovered elements
What was absent from mendeleeves table and why
The noble gases were absent, as they were u discovered becuase they are invisible and totally un reactive
How was the elements arranged in mendeleeves table
The metals and non-metals were separated and were put into groups and periods
How is the modern periodic table arranged
In order of increasing atomic number
What is discovered and added to the modern periodic table
The noble gases