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Periodic Table
Review for the periodic table exam
Question | Answer |
---|---|
How do you find the number of energy levels an atom has? | By looking at which period (row) the element is located on the periodic table. |
Which particle of an atom has almost NO mass? | electron |
How do you find the mass number of an atom? | Add the protons and neutrons in the nucleus. |
Which elements have properties of both metals & nonmetals? | metalloids |
Which elements on the periodic table are non-reactive? | noble gases |
Which elements are most similar - the elements in a group or the elements in a period? | group |
Looking at period 3 on the periodic table..do the metals or nonmetals have a larger mass? | nonmetals |
Which atom particle determines its identity? | proton |
What determines an atom's reactivity? | valence electrons |
The periodic table is arranged by what property of an atom? | atomic # |
Which particle determines an element's atomic #? | proton |
What is the electric charge of an atom? | neutral |
Which particles are in the nucleus? | protons & neutrons |