Homework Answers
12) answer- Dalton
Atomic mass of an element is measured in atomic mass unit , also known as Daltons, D .
13) answer- false
1n represents the first energy level located closest to the nucleus. Valence electron orbit is the outermost orbit .
14) answer - true
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QUESTION 12 Atomic mass is measured in units called neutrons ions daltons protons QUESTION 13 Valence...
Q-1 Rutherford's solar system model of the atom was inspired by the surprising results from his...
Q-1 Rutherford's solar system model of the atom was inspired by the surprising results from his now-famous gold foil experiment, wherein alpha particles were fired at the speed of 1.75 x 10 meters per second toward a very thin sheet of gold. (The alpha particles were scattered with some bouncing directly backward, implying the existence of a tiny, massive, positively-charged atomic nucleus!) What is the closest distance these energetic alpha particles were able to get to a stationary gold nucleus...
1. An atom of Indium-112 contains 49 protons, 63 neutrons, 49 electrons. b. 49 protons, 49...
1. An atom of Indium-112 contains 49 protons, 63 neutrons, 49 electrons. b. 49 protons, 49 neutrons, 49 electrons. c. 49 protons, 49 alpha particles d. 49 protons, 63 neutrons. 2. Which of the following atomic symbols is incorrect? d. 3. How many atoms of hydrogen are present in 6.43 g of NH? a. 2.27 x 10 b. 1.28 x 10 1.16x 10 d. 6.82 10 4. A 2.55 ml sample of ethylene glycol antifreeze) has a mass of 2.83...
Determine how many protons, neutrons, and electrons a given atom (or ion) has, given its symbol,...
Determine how many protons, neutrons, and electrons a given atom (or ion) has, given its symbol, atomic number, and mass number (and vice versa) . Describe the relative mass, charge, and location of the three basic particles in the atom (a, B, Y) 4. State what isotope serves as the current standard for the atomic mass scale. 5. Explain why atomic masses of some elements (i.e., Cu, CI) are so far from whole numbers. Bfo glqibnhq 1916 Summarize the contributions...
Atomic number c. Valance electrons d. Orbits e. Neutrons Indicate whether each of the following statements...
Atomic number c. Valance electrons d. Orbits e. Neutrons Indicate whether each of the following statements about atomic structure is true or false. a. A neutral oxygen atom has 8 electrons located in 2 different electron orbitals. T/F b. Hydrogen has only one neutron and no protons in its nucleus. T/F c. Almost all of the mass of an atom is concentrated in its electrons. T/F d. The reactivity or chemical behavior of an atom depends primarily on the number...
Are the basic units of matter: a) Elements b) Atoms c) Electrons d) Protons e) Neutrons...
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Name Development of Modern Atomic Theory -Video worksheet 1. The development of atomic theory started over...
Name Development of Modern Atomic Theory -Video worksheet 1. The development of atomic theory started over 2000 years ago with a man named 2. He believed that all matter is made up of tiny particles called 3. Who was the next person to advance atomic theory in 1808? and 4. He thought that atoms of a given element are identical in other properties. Today we know this to NOT be true because of 5. 90 years later, a man named...
The smallest chemical units of matter are atoms b) molecules c) protons d) neutrons e) electrons...
The smallest chemical units of matter are atoms b) molecules c) protons d) neutrons e) electrons . Which of the following would have the largest size? a) an atom b) a molecule c) a proton d) a neutron e) an electron 3. Isotopes of an element differ in the number of a) protons in the nucleus b) electrons in the nucleus © neutrons in the nucleus d) electron clouds e) energy levels they contain 4. VO The atomic number represents...
1) Define the following: matter, element, atom, trace element, proton, electron, neutron, atomic number, mass number,...
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When rubidium ions are heated to a high temperature, two lines are observed in its line...
When rubidium ions are heated to a high temperature, two lines are observed in its line spectrum at wavelengths (a) 7.67 x 10-7 m and (b) 3.99 x 10-7 m. What are the frequencies of the two lines? What color are the lines? Choose the answer that best completes the following: The existence of atomic line spectra indicates that. . . the energy of a photon depends on its frequency. all orbitals in s subshells must be spherical in shape....
Question 11 1 pts Which of the following experimental results suggested that the nuclear model on...
Question 11 1 pts Which of the following experimental results suggested that the nuclear model on the right is a better presentation of the atomic structure over the raisin-pudding model on the left? Thomson proposed that small, negative electrons are embedded in a sphere of positive charge. Alpha Sphere of positive charge Atoms of the same element can have different masses, due to the difference in the numbers of neutrons in the nudeus. Millikan's oil experiment determined that the fundamental...
Q-1 Rutherford's solar system model of the atom was inspired by the surprising results from his now-famous gold foil experiment, wherein alpha particles were fired at the speed of 1.75 x 10 meters per second toward a very thin sheet of gold. (The alpha particles were scattered with some bouncing directly backward, implying the existence of a tiny, massive, positively-charged atomic nucleus!) What is the closest distance these energetic alpha particles were able to get to a stationary gold nucleus...
1. An atom of Indium-112 contains 49 protons, 63 neutrons, 49 electrons. b. 49 protons, 49 neutrons, 49 electrons. c. 49 protons, 49 alpha particles d. 49 protons, 63 neutrons. 2. Which of the following atomic symbols is incorrect? d. 3. How many atoms of hydrogen are present in 6.43 g of NH? a. 2.27 x 10 b. 1.28 x 10 1.16x 10 d. 6.82 10 4. A 2.55 ml sample of ethylene glycol antifreeze) has a mass of 2.83...
Determine how many protons, neutrons, and electrons a given atom (or ion) has, given its symbol, atomic number, and mass number (and vice versa) . Describe the relative mass, charge, and location of the three basic particles in the atom (a, B, Y) 4. State what isotope serves as the current standard for the atomic mass scale. 5. Explain why atomic masses of some elements (i.e., Cu, CI) are so far from whole numbers. Bfo glqibnhq 1916 Summarize the contributions...
Atomic number c. Valance electrons d. Orbits e. Neutrons Indicate whether each of the following statements about atomic structure is true or false. a. A neutral oxygen atom has 8 electrons located in 2 different electron orbitals. T/F b. Hydrogen has only one neutron and no protons in its nucleus. T/F c. Almost all of the mass of an atom is concentrated in its electrons. T/F d. The reactivity or chemical behavior of an atom depends primarily on the number...
Are the basic units of matter: a) Elements b) Atoms c) Electrons d) Protons e) Neutrons Has a negative charge: a) Elements b) Atoms c) Electrons d) Protons e) Neutrons Whether an atom will interact with other atoms depends on how many electrons it has. a) True b) False How many electrons are in the second orbital of an atom? a) 2 b) 6 c) 8 d) 4 e) 10 How many Hydrogen atoms does a water molecule have? a)...
Name Development of Modern Atomic Theory -Video worksheet 1. The development of atomic theory started over 2000 years ago with a man named 2. He believed that all matter is made up of tiny particles called 3. Who was the next person to advance atomic theory in 1808? and 4. He thought that atoms of a given element are identical in other properties. Today we know this to NOT be true because of 5. 90 years later, a man named...
The smallest chemical units of matter are atoms b) molecules c) protons d) neutrons e) electrons . Which of the following would have the largest size? a) an atom b) a molecule c) a proton d) a neutron e) an electron 3. Isotopes of an element differ in the number of a) protons in the nucleus b) electrons in the nucleus © neutrons in the nucleus d) electron clouds e) energy levels they contain 4. VO The atomic number represents...
Question 11 1 pts Which of the following experimental results suggested that the nuclear model on the right is a better presentation of the atomic structure over the raisin-pudding model on the left? Thomson proposed that small, negative electrons are embedded in a sphere of positive charge. Alpha Sphere of positive charge Atoms of the same element can have different masses, due to the difference in the numbers of neutrons in the nudeus. Millikan's oil experiment determined that the fundamental...
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