question 7 (5 points)\nlisten\nin which of the following cases does an atom have a positive charge?\na)…

question 7 (5 points)\nlisten\nin which of the following cases does an atom have a positive charge?\na) there are more protons than electrons.\nb) there are more electrons than protons.\nc) there are more neutrons than electrons.\nd) there are more electrons than neutrons.\nquestion 8 (5 points)\nlisten\nin the nineteenth century, what was known about atoms?\na) the exact structure of all atoms\nb) the half - life of all atoms\nc) the atom determines the chemical property of an element.\nd) the number of atoms that exist in the world is increasing.

question 7 (5 points)\nlisten\nin which of the following cases does an atom have a positive charge?\na) there are more protons than electrons.\nb) there are more electrons than protons.\nc) there are more neutrons than electrons.\nd) there are more electrons than neutrons.\nquestion 8 (5 points)\nlisten\nin the nineteenth century, what was known about atoms?\na) the exact structure of all atoms\nb) the half - life of all atoms\nc) the atom determines the chemical property of an element.\nd) the number of atoms that exist in the world is increasing.

Answer

Brief Explanations:

For Question 7: Protons have a positive charge and electrons have a negative charge. When there are more protons than electrons, the atom has a net positive charge. For Question 8: In the 19th - century, it was known that the atom determines the chemical property of an element. The exact structure of all atoms was not known then, nor was the half - life of all atoms (radioactivity and half - life concepts were developed later), and the number of atoms in the world is conserved according to the law of conservation of mass.

Answer:

Question 7: A. There are more protons than electrons. Question 8: C. The atom determines the chemical property of an element.