What is responsible for the whistling sound that often accompanies firework?

What symbol of xenon would be a part of the noble gas notation for the element?

Which energy level requires the most energy to remove an electron?

A warning label is required to provide set information. The following list contains only some of this required information.

What elements are in water

Is chlorine or phosphorus trichloride more polar

How can a neutral atom become a positively-charged particle?

The last column of the periodic table contains the noble gases, elements that do not easily form chemical bonds.

When pollution is removed from the air by a natural process, it

What atomic property is different in each isotope of an element?

How do carbon-12 and carbon-13 differ? Select all that apply. They have different amounts of neutrons. They have different atomic charges. They have different mass numbers. They have different amounts of electrons.