Which of the following was originally a tenet of Dalton's atomic theory, but had to be revised about a century ago? Atoms of the same element are identical.

Atoms are tiny indivisible particles.

Compounds are made by combining atoms.

Atoms of different elements can combine with one another in simple whole number ratios.

Which element is the least metallic between cadmium, silver, zinc, or iron?

Consider the following reaction at equilibrium. 2co2 (g) 2co (g) + o2 (g) h° = -514 kj le châtelier's principle predicts that the equilibrium partial pressure of co (g) can be maximized by carrying out the reaction a. at high temperature and high pressure b. at high temperature and low pressure c. at low temperature and low pressure d. at low temperature and high pressure e. in the presence of solid carbon

Helium decays to form lithium. which equation correctly describes this decay?