1. Discuss the following situations and explain what should have been done instead. • You hear that your friend has been caught stealing. You tell another friend about it. • You hear two people gossiping about your friend. You go away and pretend you never heard it. • You hear that a bad rumour is being spread about you. You stay at home instead of going to school. • A classmate who had been getting poor marks in his tests got a very good mark in the latest test. You think 'He must have cheated. • A new girl in class does not join in the games during the recess. Your classmate says the new girl is arrogant and unfriendly.
Answers
Explanation:
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According to Thomson€™s model of the atom, an atom consists of both negatively and positively charged particles. ... The negatively charged particles are embedded in the positively charged sphere. These negative and positive charges are equal in magnitude.
Atoms are electrically neutral because they have equal numbers of protons (positively charged) and electrons (negatively charged). If an atom gains or loses one or more electrons, it becomes an ion.
Thomson knew that atoms had an overall neutral charge. Therefore, he reasoned that there must be a source of positive charge within the atom to counterbalance the negative charge on the electrons. ... The plum pudding model depicts the electrons as negatively-charged particles embedded in a sea of positive charge.