periodic table of elements Flashcards
1
Q
what is the periodic table of elements
A
the universal catalog of every know element in the universe
2
Q
What information does the table provide
A
what elements are present
how many subatomic they have
3
Q
How does it organize the elements
A
In order of their properties and electron configuration
4
Q
When and who came up with the concept of atomic number
A
1913; Henry Mosely (British Chemist)
5
Q
how are they organized by henry mosely
A
by their increasing atomic numbers
similar chemical and physical properties
similar electron configuration
6
Q
what are the vertical columns called
A
groups or families
7
Q
what are the horizontal rows called
A
periods
8
Q
properties of metals
A
shiny hard malleable and ductile conducts heat and electricity solid
9
Q
properties of non-metals
A
not shiny brittle not malleable and ductile cannot conduct heat and electricity state varies
10
Q
properties of metalloids/semi-metals
A
not shiny brittle not malleable and ductile semi conductors of heat and electricity solid
