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To know the element name on the periodic table, you need to know the number of neutrons in the nucleus.
Q10: The main reason for positioning many radio
Q23: _ is/are caused by the interaction of
Q31: What observations demonstrate the existence of an
Q49: _ is a set of rules that
Q89: Sunspots<br>A)are hotter than their surroundings.<br>B)are regions where
Q90: Star clusters are important to the study
Q96: Blue stars are hotter than red stars.
Q98: The Orion region contains young main-sequence stars
Q122: When two objects of unequal masses orbit
Q150: The absorption lines in the infrared portion