మీనింగ్ ఆఫ్ లాండర్ ఇంట్రడక్షన్
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Answer:
The plum pudding model is one of several historical scientific models of the atom. First proposed by J. J. Thomson in 1904[1] soon after the discovery of the electron, but before the discovery of the atomic nucleus, the model tried to explain two properties of atoms then known: that electrons are negatively-charged particles and that atoms have no net electric charge. The plum pudding model has electrons surrounded by a volume of positive charge, like negatively-charged "plums" embedded in a positively-charged "pudding". The word "plums" in 19th-century English "plum pudding" is an archaic use of the word; it referred at that time to raisins, not plums.
Answer:
Explanation:
a spacecraft designed to land on the surface of a planet or moon.