Question

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1. most active nonmetals
2. group ii metals
3. the atomic number is the number of ____.
4. metals tend to form ____ ions.
5. the elements are arranged by atomic ____.
6. the vertical columns are called families, or ____.

Explanation:

1. The most active non - metals are the halogens in Group 17 of the periodic table.
2. Group II metals are the alkaline earth metals.
3. The atomic number is the number of protons in an atom.
4. Metals tend to lose electrons and form positive (cation) ions.
5. Elements in the periodic table are arranged by atomic number.
6. The vertical columns in the periodic table are called groups or families.

Answer:

1. Halogens
2. Alkaline earth metals
3. Protons
4. Positive (cation)
5. Number
6. Groups