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true or false Science and theories had to be changed many times in light of new observations and findings.

asked Sep 26, 2016

History
high-school

2 answers

4 votes

206k views

Which of these statements is incorrect regarding an atom of the element scandium? A. Its chemical symbol is Sc. B. It has 21 positively charged protons in its nucleus. C. It has 21 neutrons in its nucleus.

asked Sep 15, 2016

Chemistry
high-school

1 answer

1 vote

206k views

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