Use the periodic table to find the molar

mass of each element.

molar mass H =

g/mol

molar mass S =

g/mol

molar mass O =

g/mol

DONE

Which of the following provides evidence to support Thomson's hypothesis about electrons? A.) Gold foil experiment B.) Cathode ray experiments C.) Spectrum of colors emitted by gas D.

The nucleus of an atom of the copper isotope 63Cu contains 29 protons and 34 neutrons. How many electrons must be removed from a neutral 63Cu atom to completely ionize it, leaving only a nucleus

What do metals become after they donate electrons?

Why was helium absent from mendeleev's original periodic table of 1871?

At an atmospheric pressure of 870 mm hg of 21% oxygen, the partial pressure of oxygen is

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Essential amino acids are those that our bodies cannot synthesize. question 7 options: true false

What is linen composed of

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