-
What is the maximum number of electrons that can fit into the second shell?
8
-
What atom has the electron configuration 2,8,5?
Phosphorus
-
Which atom is the most stable: F, Ne, Na?
Ne
-
Which of these elements has two electrons in its outer shell?
Barium
-
Which of these elements has three occupied electron shells?
Silicon
-
What is the electron configuration of calcium?
2,8,8,2
-
What element is in Period 2, Group 7?
Fluorine
-
What is present at the centre of an atom?
Nucleus
-
Which sub-atomic particle has a mass of 1 and no charge?
Neutron
-
What name is given to different versions of atoms that have the same number of protons but different numbers of neutrons?
Isotopes
|
|