In atomic model, negative electrons orbit the positively charged nucleus.
a. dalton's b. rutherford's
c. thomson's d. democritus's

Who discovered a pattern to the elements in 1869?

The density of the solid phase of a substance is 0.90 g/cm3 and the density of the liquid phase is 1.0 g/cm3. a large increase in pressure will a. lower the freezing point b. raise the freezing point c. lower the boiling point d. raise the triple point e. lower the triple point

Give one example of a pure (exact) number and of an estimated (measured) number.