How are mixtures compounds and elements alike?

Why is neon in the same group on the periodic table as helium?

Which process is accompanied by a decrease in entropy? (1) boiling of water (2) condensing of water vapor (3) subliming of iodine (4) melting of ice

Hat would be the best technique to separate a mixture of pigments in a sample of ink? Distillation Chromatography Filtration Evaporation

What determines an element's emission spectrum? O A. The size of the sample O B. The mass of the nucleus O C. The electron energy levels O D. The number of protons

As the nucleus of an unstable atom emits only gamma radiation, the nucleus must

The molecules of a substance are moving rapidly in a container. The molecules do not interact with each other. If the container is opened, the molecules will escape from the container.

Why is fluorine a gas?

What is the empirical formula for a compound if a sample contains 3.72g of p and 21.28g of cl?-pcl5-pcl3-p2cl10-p2cl5

Use the equation 2HgO--> 2Hg+O2 to find how many moles of mercury are produced if 27 g of oxygen are produced. 2.1 1.3 2.6 2.4

How much mass does an electron, proton, and neutron have?