Biology
mahria
28

The wave mechanical models states that we can predict the path and location of an electron to 100% accuracy and precision. True False QUESTION 2 Neutrons contribute ________ to the nucleus of an atom but do not contribute _______ to the nucleus. mass, charge charge, energy energy, mass QUESTION 3 Which of the following is the best definition of an atom? charged particles that make up all living things negatively charged particles that flow in electric current small particles that make up all matter QUESTION 4 Why do atoms have an overall neutral charge? All atoms have more neutrons than protons. Atoms have neutrally-charged neutrons surrounding the nucleus. The positively-charged protons balance out the negatively-charged electrons. QUESTION 5 Which of the following best summarizes the wave mechanical model of atoms? Electrons reside in known positions in fixed orbits around the nucleus. Electrons are waves that travel in known paths around the protons. Electrons display some properties of waves and while they reside outside of the nucleus, their positions cannot be known with certainty. QUESTION 6 Democritus was the first to state that matter is made of tiny particles that cannot be divided can be divided are small and round QUESTION 7 Which statement accurately describes the location of electrons in the Bohr model of the atom? Electrons travel around the nucleus in fixed energy levels with energies that vary from level to level Electrons travel around the nucleus in fixed energy levels with equal amounts of energy Electrons travel randomly in the relatively large space outside the nucleus QUESTION 8 Thomson suggested a plum pudding model of the atom. In this model the atom has a concentrated positively charged nucleus and electrons that move around it the atom has a cloud of positive charge with electrons randomly embedded in it the atom has a central nucleus with electrons that reside in specific energy levels around it QUESTION 9 The nucleus of an atom has a neutral charge because the protons and electrons cancel each other out. True False QUESTION 10 Electrons are much larger than protons and neutrons. True False

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(2) Answers
Annabel604

Question 1 is false. The wave mechanical model does not have 100% accuracy and precision of the location of the electron. Question 2: Neutrons contribute mass to the nucleus but do not contribute charge to the nucleus. Question 3: The best definition of an atom is: small particles that make up all matter. Question 4: The answer is the positively-charged protons balance out the negatively-charged electrons. Question 5: The answer is Electrons display some properties of waves and while they reside outside of the nucleus, their positions cannot be known with certainty. Question 6: The answer is that Democritus discovered that atoms cannot be divided. Question 7: The answer is Electrons travel around the nucleus in fixed energy levels with energies that vary from level to level. Question 8: The answer is false. The nucleus is positively charged. Question 9: The answer is false. Electrons are much smaller than protons and neutrons.

AdelaHolz264

Question 1 is false. The wave mechanical model does not have 100% accuracy and precision of the location of the electron. Question 2: Neutrons contribute mass to the nucleus but do not contribute charge to the nucleus. Question 3: The best definition of an atom is: small particles that make up all matter. Question 4: The answer is the positively-charged protons balance out the negatively-charged electrons. Question 5: The answer is Electrons display some properties of waves and while they reside outside of the nucleus, their positions cannot be known with certainty. Question 6: The answer is that Democritus discovered that atoms cannot be divided. Question 7: The answer is Electrons travel around the nucleus in fixed energy levels with energies that vary from level to level. Question 8: The answer is false. The nucleus is positively charged. Question 9: The answer is false. Electrons are much smaller than protons and neutrons.

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