Which is true about periods and groups?
O Groups are horizontal and their number tells us the number of energy levels in an atom of that
element. Periods are vertical and contain elements with similar properties.
Periods are horizontal and their number tells us the number of energy levels in an atom of that
element. Groups are vertical and contain elements with similar properties.
Answers: 2
Chemistry, 22.06.2019 10:30, ciel8809
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.
Answers: 1
Chemistry, 22.06.2019 14:30, darkghostmist
What type of reaction fuels the processes seen here?
Answers: 2
Which is true about periods and groups?
O Groups are horizontal and their number tells us the numbe...
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