In which Era did the first fish appear?

Is an elements reactivity determined by the number of protons found in an atom of the element

How does a lithium cation compare to a lithium atom? A. The cation is larger. B. The cation has the same radius. C. The cation is smaller. D. The cation has the same charge.

You discover a new type of gland associated with the skin. chemical analysis of the product shows a secretion has a ph of 4, consists of 99% water, and contains traces of normal electrolytes including urea, vitamin c, and dermicidin.

A 12.5 L container of neon had a pressure change from 125 kPa to 35 kPa. What is the new volume

In addition to resembling one another, what other criteria are required for organisms to be grouped in the same species? A. They migrate only with one another. B. They fight only with one another. C. They share food only with one another. D.

According to the quantum-mechanical model of the atom established by shrödinger, where may the electrons of an atom be found?

Renewable resources cannot be replaced in our lifetime

How do you make a guy who is extremely into you, even though he knows you aren't single, to bug off?

A chemist has dissolved a certain substance in water. The chemist knows that more of the substance could be dissolved into the water before it stops dissolving. Therefore, the current solution is

Which of these particles is the smallest? A. an atom B. a nucleus C. a proton D. an electron