Examlex
Elements that belong to the same period have the same number of valence electrons.
Punctuation
The marks used in writing that clarify meaning by indicating separation of phrases, clauses, or to denote pauses.
Meanwhile
Concurrently; at the same time or during the same period that something else is happening.
Capitalization
The practice of using uppercase letters at the beginning of sentences or proper nouns to denote importance or signify starting points.
Occurrence
An event or instance that happens or takes place.
Q23: uranium-235
Q24: water boiling<br>A)sublimation<br>B)evaporation<br>C)melting<br>D)condensation<br>E)freezing
Q27: lb<br>A)time<br>B)energy<br>C)electrical charge<br>D)mass<br>E)length<br>F)volume<br>G)temperature<br>H)density
Q48: Erwin Schrödinger<br>A)Proposed that the electrons inside of
Q58: water<br>A)non-molecular<br>B)molecular
Q69: If the following ions Ca₂+, NO₃-, Na+
Q83: Red light is the lowest frequency of
Q90: Energy is released as two atoms, such
Q94: Which orbital is dumbbell-shaped?<br>A) 2s<br>B) 3p<br>C) 4d<br>D)
Q138: Which of the following subshells does not