What information guided Mendeleev as he placed elements in his periodic table

During a flame test, ions of a specific metal are heated in the flame of agas burner. A characteristic color of light is emitted by these ions inthe flame when the electrons (1) gain energy as they return to lower energy levels (2) gain energy as

Describe the interactions of the nervous and the muscular system

My friend is just asking away, but what are clouds made from?

Is the enzyme catalyzed reaction of h2o an endothermic or exothermic reaction?

A student forgot to include the 12 h2o when calculating the formula mass of the compound. how will the calculated percent yield be affected?

Explain the difference between two types of elements with respect to the atoms

The ro - group is the nucleophile. think about which group in the alkyl halide (iodoethane) is the leaving group. keep in mind that the leaving group may be one atom or a group of atoms.

An organic compound is classified as aromatic if it cyclic and has a fragrant odor true or false

Which subatomic particles differ in number for two isotopes of the same element, and which subatomic particles will stay consistent between two isotopes of the same element? Explain how you know.

What is the oxidation state of an individual phosphorus atom in PO33-?