The Periodic Table Flashcards
How did Newland arrange the periodic table?
By Newland’s ‘Octaves’. Every 8 had similar chemical and physical properties
How did Döbereiner arrange the periodic table?
The ‘law of triads’. It appeared that three elements had the same properties.
How did Mendeleev arrange the periodic table?
By relative atomic mass and chemical and physical properties
Why are elements arranged in groups?
They have similar chemical and physical properties.
What information does the group number give you?
The number of electrons in the last shell.
How many electrons does Carbon have in its last shell?
4
What does the period tell you about the element?
The number of energy shells
How many shells does lithium have?
2
Where are metals found on the periodic table?
The left of the the staircase.
Where are non metals found on the periodic table?
The right of the staircase
What is the mass number referring to?
The number of protons and neutrons on the element.
What is the atomic number referring to?
The number of protons in the element.
What does Chlorine have a mass of 35.5?
It is an average number of a mass of 35 and 37.
Which group has a complete energy shell and is unreactive?
Noble gases
What is the pattern of reactivity for group 1?
More reactive as you move down the group
