The father of the periodic table of the elements is
Elements in the periodic table are arranged by
Atomic number of an element is always equal to the
Mass number of an element is equal to the number of
Which of the following is always the same for an atom?
In the periodic table, metals are located
Groups (or families) are
Elements located in a group have
Elements in Group 18 are called
Elements in Group 2
The number of __________________ determines the reactivity of a group of elements.
The most reactive elements in the periodic table are found in
The element in the periodic table with 17 protons is
How many neutrons does nitrogen have?
The element in Group 1, period 3 is
The noble gas in period 6 is called
The elements in Groups 3-12 are called
The greatest electronegativity is found
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