The Modern Periodic Table Flashcards
Atomic Structure and the Periodic Table (13 cards)
How many elements are there that all materials are made of?
100
This refers to the total number of chemical elements known.
In the periodic table, how are the elements arranged?
In order of increasing atomic (proton) number
This arrangement leads to periodic trends in element properties.
What are the repeating patterns in the properties of elements in the periodic table called?
Periodic properties
The name ‘periodic table’ derives from these periodic properties.
What is the significance of the periodic table?
Organizes elements and their properties
It makes it easier to remember and understand element properties.
Where are metals and non-metals located in the periodic table?
Metals are to the left and non-metals are to the right
This spatial arrangement helps in identifying the type of elements.
What are the vertical columns in the periodic table called?
Groups
Elements in the same group share similar properties.
What does the group number indicate about the elements?
The number of electrons in the outer shell
This affects how atoms react.
What is the exception in group 0 concerning outer shell electrons?
Helium has two electrons in its outer shell
This differs from the trend of other groups.
What can be predicted about elements in the same group?
Their properties and reactivity
Knowledge of one element’s properties can help infer those of others in the group.
Which elements are included in Group 1?
Li, Na, K, Rb, Cs, Fr
These elements are all metals and exhibit similar reactivity.
What trend is observed in the reactivity of Group 1 elements?
Reactivity increases as you go down the group
This trend is important for understanding chemical behavior.
What trend is observed in the reactivity of Group 7 elements?
Reactivity decreases as you go down the group
This trend also reflects the properties of halogens.
What are the horizontal rows in the periodic table called?
Periods
Each period corresponds to a new full shell of electrons.
