Question
une the folowing model to answer go C. man many lone pain are found in the model above? dot (P): A. 1 6. How many bonding electrons are four.2 the model above? A. 1 B. 3 7. How many neutrons does Copper-65 contain? A. 29 8. How many neutrons does Barium-139 contain? B. 36 A. 56 9. How many electrons does strontium contain? B. 137 A. 56 B. 84 10. How many valence electrons does neon have? C. 6 A. 2 B. 4 C. 8 11. Which of the following elements have 7 valence electrons? A. Mn C. F B. N D. Ag 12. How many valence ce electrons are in an atom of sulfur? A. 2 C. 6 B. 16 D. 5 13. How many va valence electrons are in an atom of phosphorus? A. 2 C. 4 B. 3 D. 5 14. Which subatomic particle plays the greatest part in determining the properties of an element? A. proton C. neutron B. electron D. nucleus Determine the number of neutrons in {}^16O A. 4 C. 16 B. 8 D. 24 C. 2 D. C. 2 D. 0 C. 65 D. 92 C. 83 D. 193 C. 38 D. 193
Solution
4.3
(232 Votos)
Yasmin
Profissional · Tutor por 6 anos
Resposta
Let's go through each question one by one:1. How many lone pairs of electrons are found in the model above? - The question does not provide a model to refer to, so it is impossible to determine the number of lone pairs of electrons.2. How many bonding electrons are in the model above? - Again, without a model to refer to, it is impossible to determine the number of bonding electrons.3. How many neutrons does Copper-65 contain? - The atomic number of copper (Cu) is 29, which means it has 29 protons. The mass number of Copper-65 is 65. To find the number of neutrons, subtract the number of protons from the mass number: 65 - 29 = 36. Therefore, Copper-65 contains 36 neutrons.4. How many neutrons does Barium-139 contain? - The atomic number of barium (Ba) is 56, which means it has 56 protons. The mass number of Barium-139 is 139. To find the number of neutrons, subtract the number of protons from the mass number: 139 - 56 = 83. Therefore, Barium-139 contains 83 neutrons.5. How many electrons does strontium contain? - The atomic number of strontium (Sr) is 38, which means it has 38 electrons. Therefore, strontium contains 38 electrons.6. How many valence electrons does neon have? - Neon (Ne) is a noble gas with an atomic number of 10. It has 10 electrons, and all of them are valence electrons. Therefore, neon has 10 valence electrons.7. Which of the following elements have 7 valence electrons? - The elements with 7 valence electrons are those in Group 15 of the periodic table. Among the given options, nitrogen (N) is in Group 15 and has 7 valence electrons.8. How many valence electrons are in an atom of sulfur? - Sulfur (S) is in Group 16 of the periodic table and has 6 valence electrons.9. How many valence electrons are in an atom of phosphorus? - Phosphorus (P) is in Group 15 of the periodic table and has 5 valence electrons.10. Which subatomic particle plays the greatest part in determining the properties of an element? - The properties of an element are determined by the number of protons in its nucleus, which is the atomic number. Therefore, the correct answer is proton.11. Determine the number of neutrons in
- The atomic number of oxygen (O) is 8, which means it has 8 protons. The mass number of
is 16. To find the number of neutrons, subtract the number of protons from the mass number: 16 - 8 = 8. Therefore,
contains 8 neutrons.