How many electrons does it take to weight the same as one proton?

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

Suppose a student did not fully redissolve the Al (OH) 3 that initially formed upon the addition of H2SO4. Predict and explain how this would impact the apparent percent yield this student determines.

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

What is linen composed of

Which of the following elements has the lowest electronegativity? A) Xe B) Rb C) I D) Cl

An oxidation-reduction reaction is also known as a redox reaction. What is one way you could tell that a redox reaction has occurred? a. when one substance transfers electrons to another. b. when a substance reacts with oxygen. c.