1. Explain what Jean-Baptiste Lamarck thought and what Charles Darwin though about why animals changed over time.

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The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false

As we move from left to right across the periodic table, what is the general trend? a) atomic radii increase. b) electronegavitiy decreases. c) nuclear shielding increases. d) metallic character decreases.

On the periodic table, elements are arranged by which of the following. a. mass numbers. b. increasing atomic number. c. alphabetical order. or d. density