Identify the symbol for the missing element in each group.
Be
Mg
Ca

Ba

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Solution

The finding of group number:
The atomic number of beryllium is 4
It has 2 valence electrons.
So it belongs to group 2.

According to the periodic table,
The elements belonging to group 2 are beryllium, magnesium, calcium, strontium, barium, and radium.
So, the missing element should be strontium.

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Identify the symbol for the missing element in each group.BeMg Ca Ba

The finding of group number:The atomic number of beryllium is 4It has 2 valence electrons.So it belongs to group 2. According to the periodic table, The elements belonging to group 2 are beryllium, magnesium, calcium, strontium, barium, and radium.So, the missing element should be strontium.

Identify the symbol for the missing element in each group.
Be
Mg
Ca

Ba

The finding of group number:
The atomic number of beryllium is 4
It has 2 valence electrons.
So it belongs to group 2.

According to the periodic table,
The elements belonging to group 2 are beryllium, magnesium, calcium, strontium, barium, and radium.
So, the missing element should be strontium.