Define the number of electrons on the outer shell of the atoms in the following elements: – a) 13 Al 2e 8e … – b) 17 Cl 2e 8e … – c) 20 Ca 2e 8e 8e … 3. Look at the periodic table. How many electron s
Define the number of electrons on the outer shell of the atoms in the following
elements:
– a) 13 Al 2e 8e …
– b) 17 Cl 2e 8e …
– c) 20 Ca 2e 8e 8e …
3. Look at the periodic table. How many electron shells are there in:
– a) the 7 th element
– b) the 10 th element
– c) the 16 th element
– d) the 20 th element
4. Which elements have the following electron configurations?
– a) 1s 2 2s 1
– b) 1s 2 2s 2
– c)1s 2 2s 2 2p 3
– d) 1s 2 2s 2 2p 6
