Chapter 10- The periodic table Flashcards
1
Q
How are the atoms in the periodic table arranged?
A
Placed in order of increasing atomic number. A new horizontal row is started for each noble gas.
The vertical columns are called groups and the horizontal periods.
2
Q
What do the group numbers mean?
A
They are the same as the number of electrons in the outermost shell.
3
Q
Group 1- Alkali Metals
A
All react with water to form alkali solutions.
4
Q
Group 7- The Halogens
A
All form salts when the react with metals.
5
Q
Group 8- Noble Gases
A
They are inert (chemically unreactive) because they have a complete outer shell.
