Period
Group
Explanation:
On the periodic table the numbers 1,2 and 3 can represent either groups or periods.
The periodic table gives the arrangement of elements based on their atomic numbers
- They are divided into vertical columns and horizontal rows
- The vertical columns are the groups whereas the horizontal rows are the periods.
- The vertical columns are made up of elements having the same number of electrons in their outermost shell.
- The horizontal columns are made up of elements having the same number of shell.
- On the periodic table, the groups are numbered 1 - 18
- There are 7 periods on the table.
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Periodic table brainly.com/question/1971327
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Answer: CaSO3
Explanation:Please see attachment for explanation
Neutrons the way this question is setup the atom would not be able to be neutral
<span>2 phosphorus and 5 oxygen</span>
A simple magnetic compass can be used
