What happens when certain elementary particles (such as electrons or neutrons) are missing or are over-abundant...
What happens when certain elementary particles (such as electrons or neutrons) are missing or are over-abundant and how do atoms build stable structures such as molecules and crystals.
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The molecule or atom become potively or negatively charged and atom of different charge joined together to form stable molecular str
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What happens when certain elementary particles (such as
electrons or neutrons) are missing or are over-abundant...
When atoms of beryllium-9 are bombarded with alpha particles, neutrons are produced. What new isotope is...
When atoms of beryllium-9 are bombarded with alpha particles, neutrons are produced. What new isotope is also formed? Select one: 0 0 0 0 0
1. What happens at the level of molecules, when a solid becomes a liquid? 2. Why...
1. What happens at the level of molecules, when a solid becomes a liquid? 2. Why do some parts of the crystals melt before the whole crystal or some other crystals? 3. Look up the melting points (in C) of the following species and include the reference. Benzoic acid Reference Fructose Reference Ascorbic acid Reference 4. Stable solids have strong bonds between molecules. Of the three compounds melted benzoic acid, fructose, and ascorbic acid-rank them from weakest bonds to strongest...
What happens when a primary structure forms a secondary structure? Match the words in the left...
What happens when a primary structure forms a secondary structure? Match the words in the left column to the appropriate blanks in the sentences on the right. Make certain each sentence is complete before submitting your answer. Terms may be used once, more than once, or not at all. Reset Help carboxylic acid a helix When atoms in the backbone of a protein or peptide form within a single or between chains, a secondary structure results. The two most common...
1.33 Electrons in molecules are described by wavefunctions that extend over more than one atom. Consider...
1.33 Electrons in molecules are described by wavefunctions that extend over more than one atom. Consider an electron that is described by a wavefunction that extends over two adjacent carbon atoms. The electron can move freely between the two atoms. The internuclear C-C distance is 139 pm. (a) Using the one-dimensional particle-in-the-box model, calculate the energy required to promote an electron from the n=1 to the n = 2 level, assuming that the length of the box is the same...
Do not refer to the text when taking this test. An element has an atomic number...
Do not refer to the text when taking this test. An element has an atomic number of 11 and an atomic weight of 23. Its number of neutrons is a. 11. b. 12. c. 23. d. 24. The atom of an clement has 1 proton and 2 neutrons. Its atomic number is a. 1. b. 2. c. 3. d. 6. The atom of an element has 6 protons and 8 neutrons. The number of electrons in this atom is a....
Problem 1 Concept: Elementary Particles 0 Not finished! Level: Basic Emission of which particle below will...
Problem 1 Concept: Elementary Particles 0 Not finished! Level: Basic Emission of which particle below will decrease the mass number by 1, but have no affect on the atomic number? a gamma photon a neutron a beta particle an alpha particle Problem 2 Concept: Nuclear reactions 0 Not finished! Level: Basic When 59Cu undergoes positron emission, what is the immediate nuclear product? 59Zn 58Cu 59Ni 58Ni Problem 3 Concept: Radioactivity 0 Not finished! Level: Basic Which of the nuclides is...
2. What happens when a few crystals are added to a supersaturated solution? Identify the situation...
2. What happens when a few crystals are added to a supersaturated solution? Identify the situation in the experiment where a supersaturated solution existed. Explain. 3. Was the KCl sample under Condition A unsaturated, saturated, or supersaturated? How do you know? 4. Was the KCl sample under Condition Dunsaturated, saturated, or supersaturated? Explain your observation that confirms your answer. Part II. Solubility and Structure Observations- Observations- Conclusion-Predict whether the substance is ionic, nolar covalent, Substance
why is the particles represented on the graph 3 million? (question c) Why? When a sample...
why is the particles represented on the graph 3 million? (question
c)
Why? When a sample of matter is heated, the particles speed up. But what does that mean? Are all the particles in a sample moving at the same speed? Do they all speed up equally? Does mass affect partide speed Two scientists, James Maxwell and Ludwig Boltmann. proposed an equation that could be used to predict the speeds of ideal gas particles (atoms or molecules) at any temperature....
1. Why do ions like Na+ and Cl- tend to stick together? What kind of bond...
1. Why do ions like Na+ and Cl- tend to stick together? What kind of bond results from this force? 2. Why do the nuclei of an oxygen atom and two hydrogen atoms remain close together in the structure of a water molecule? What is more stable about a molecule of H2O than three separate atoms of O, H, and H? 3.How is the force holding the water molecule together different from an ionic bond? 4. What makes the covalent...
1. Current research has shown that lysosomes carry out more tasks than was previously thought. What...
1. Current research has shown that lysosomes carry out more tasks than was previously thought. What new roles do we now know lysosomes perform? Select the TWO answers that are correct. stimulate digestion of energy reserves under fasting conditions Ostimulate breakdown of reserves when resources are abundant stimulate cellular motility (movement) when local resources are scarce stimulate celular growth and reproduction when resources are abundant 2. How might lysosomes affect physical health? Select the TWO answers that are correct. Because...
When atoms of beryllium-9 are bombarded with alpha particles, neutrons are produced. What new isotope is also formed? Select one: 0 0 0 0 0
1. What happens at the level of molecules, when a solid becomes a liquid? 2. Why do some parts of the crystals melt before the whole crystal or some other crystals? 3. Look up the melting points (in C) of the following species and include the reference. Benzoic acid Reference Fructose Reference Ascorbic acid Reference 4. Stable solids have strong bonds between molecules. Of the three compounds melted benzoic acid, fructose, and ascorbic acid-rank them from weakest bonds to strongest...
What happens when a primary structure forms a secondary structure? Match the words in the left column to the appropriate blanks in the sentences on the right. Make certain each sentence is complete before submitting your answer. Terms may be used once, more than once, or not at all. Reset Help carboxylic acid a helix When atoms in the backbone of a protein or peptide form within a single or between chains, a secondary structure results. The two most common...
1.33 Electrons in molecules are described by wavefunctions that extend over more than one atom. Consider an electron that is described by a wavefunction that extends over two adjacent carbon atoms. The electron can move freely between the two atoms. The internuclear C-C distance is 139 pm. (a) Using the one-dimensional particle-in-the-box model, calculate the energy required to promote an electron from the n=1 to the n = 2 level, assuming that the length of the box is the same...
Do not refer to the text when taking this test. An element has an atomic number of 11 and an atomic weight of 23. Its number of neutrons is a. 11. b. 12. c. 23. d. 24. The atom of an clement has 1 proton and 2 neutrons. Its atomic number is a. 1. b. 2. c. 3. d. 6. The atom of an element has 6 protons and 8 neutrons. The number of electrons in this atom is a....
2. What happens when a few crystals are added to a supersaturated solution? Identify the situation in the experiment where a supersaturated solution existed. Explain. 3. Was the KCl sample under Condition A unsaturated, saturated, or supersaturated? How do you know? 4. Was the KCl sample under Condition Dunsaturated, saturated, or supersaturated? Explain your observation that confirms your answer. Part II. Solubility and Structure Observations- Observations- Conclusion-Predict whether the substance is ionic, nolar covalent, Substance
why is the particles represented on the graph 3 million? (question
c)
Why? When a sample of matter is heated, the particles speed up. But what does that mean? Are all the particles in a sample moving at the same speed? Do they all speed up equally? Does mass affect partide speed Two scientists, James Maxwell and Ludwig Boltmann. proposed an equation that could be used to predict the speeds of ideal gas particles (atoms or molecules) at any temperature....
1. Current research has shown that lysosomes carry out more tasks than was previously thought. What new roles do we now know lysosomes perform? Select the TWO answers that are correct. stimulate digestion of energy reserves under fasting conditions Ostimulate breakdown of reserves when resources are abundant stimulate cellular motility (movement) when local resources are scarce stimulate celular growth and reproduction when resources are abundant 2. How might lysosomes affect physical health? Select the TWO answers that are correct. Because...
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