1. The _____ number is the sum of the protons and neutrons.
2. The _____ gases are considered inactive.
3. The horizontal rows are termed __
4. Most elements are _____.
5. Nonmetals tend to form ions with a _____ charge.
2. The _____ gases are considered inactive.
3. The horizontal rows are termed __
4. Most elements are _____.
5. Nonmetals tend to form ions with a _____ charge.
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Answer:
1. atomic mass
2. noble
3. periods
4. [insufficient information] pero try ko, Metallic
5. negative