Which of the following statements is true? A.
Protons are located outside the nucleus of an atom.
B.
Electrons do not have mass.
C.
Individual atoms can be seen with the naked eye.
D.
The nucleus of an atom contains protons and neutrons.
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What are the percent by mass of copper in penny lab

Aglow stick contains a glass vial with chemicals. when the glow stick is bent, the vial breaks and the chemicals react to produce a glow. a science student observes that a glow stick kept in the freezer glows for a longer duration than a glow stick kept at room temperature. what conclusion can be drawn based on the observation? be sure to note the outcome and test variables in the conclusion.

Why does earth rotate? because earth is formed from cold gases collapsing due to gravity because the matter in the nebula that formed earth was spinning because earth forms more than 99% of the mass of the solar system because the hydrogen atoms inside the nebula fused to form helium