1d - the periodic table Flashcards
what are the properties of the noble gases?
- Non-metals
- colourless gases at room temperature
- low boiling points
- unreactive
what are the trends in properties down the group. (noble gases)
The boiling point increases as the atoms get heavier.
what are the columns of the periodic table called?
Groups
what are the rows of the periodic table called?
Periods
Are elements in the same group similar or different?
They usually have similar chemical properties because they have the same number of outer shell electrons.
In terms of energy levels, what are the differences between elements of the same period?
They have the same number of energy levels
what are the elements of Group 0 known as?
The noble gases
Elements in the same group have the same number of electrons in their outer shell; what does this tell you about their chemical properties?
They have similar chemical properties
In terms of shells, what is the difference between elements in the same period?
They have the same number of shells
What change in shell number is seen as you move down a group?
The number of shells increases
what are the majority of elements?
Metals
what elements react to form positive ions?
Metals
what elements don’t form positive ions?
Non-metals
what are elements in group 1 known as?
The alkali metals
what are the elements in group 7 known as?
The halogens
true or false?
the number of electrons in an atom changes during chemical reactions
true.
the number of electrons in an atom changes during chemical reactions
what do periods in the periodic table indicate?
the number of electron shells in an atom
how are elements arranged in the periodic table?
by increasing atomic number in periods and groups
true or false?
each element has one proton more than the previous one.
true.
what is an electronic configuration?
the arrangement of electrons in shells
what is the max number of electrons in the first shell?
2 electrons
what info does the group give about electronic configuration?
the number of outer electrons
what is the max number of electrons in the second and third shells?
8 electrons
true or false?
most elements have full outer shell of electrons
false
