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(1 point)
Elements in the same main group (select all correct answers):
(1 point)
Elements in the same period (select all correct answers):
(3 points)
Strontium (Sr) is in group 2 and period 5 of the periodic table.
How many electron shells do strontium atoms have?
How many valence electrons do strontium atoms have?
What is the charge of a strontium ion?
(3 points)
Bromine (Br) is in group 17 and period 4 of the periodic table.
How many electron shells do bromine atoms have?
How many valence electrons do bromine atoms have?
What is the charge of a bromine ion?
(1 point)
Element A is in group 1 of the periodic table. Element B is in group 16 of the periodic table.
An ionic compound formed from element A and element B will have the ionic formula:
(1 point)
The biggest influence on the layout of the periodic table is: