The elements to the right of the zigzag line on the periodic table are called
Most metals are
A chemical symbol represents the __________________ of an element.
Elements that are gases, are brittle, and are poor conductors at room temperature are
Noble gases are stable because
What is the symbol for carbon?
Which element has the atomic number 3?
Alkali metals are __________ reactive than alkaline earth metals.
What is the atomic number of oxygen?
What has changed about the periodic table since Mendeleev?
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