Periodic table — role?
Organizes elements by atomic structure
Substance formulas — purpose?
Represent element or compound composition
Neutrons: charge
No electric charge in nucleus
Protons: charge
Positively charged, in nucleus
Valence electrons
Determine chemical behavior
Atomic mass formula
Protons + neutrons
Relative atomic mass
Compared to carbon-12 scale
Simple substance
Made of one element only
Compound substance
Made from multiple elements
Answer 8 questions on Fundamentals of Chemistry.
1. Which statement correctly describes the mass number of an atom?
2. What can be determined from an element’s position in the periodic table group and period?
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