1. An element belongs to Group 9. What common name might be used to describe the...
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An element belongs to Group 9. What common name might be used to
describe the...
Hydrogen - Atomic number Helium - He He 4.00 First Mass number Element symbol shell Electron-...
Hydrogen - Atomic number Helium - He He 4.00 First Mass number Element symbol shell Electron- distribution diagram Lithium Beryllium Be Boron Carbon Fluorine 6C Nitrogen N Neon 10 Ne Second shell Silicon Sodium 11 Na Aluminum Phosphorus Magnesium 12 Mg Chlorine 17C1 Argon 18Ar 14Si 1SP Third shell According to the section of the Periodic Table of Elements above, which element is most likely to have similar chemical properties to carbon? A. Nitrogen OB. Silicon C. Phosphorus D. Boron
Hydrogen 1H 2- Atomic number He Helium - He Mass number First shell Element symbol- Electron-...
Hydrogen 1H 2- Atomic number He Helium - He Mass number First shell Element symbol- Electron- distribution diagram Lithium Beryllium Carbon Boron 3B Oxygen Nitrogen en N Fluorine انار Neon Be 10 Ne Second shell Sodium 11 Na Aluminum AI Sulfur Magnesium 12Mg Chlorine Phosphorus Silicon 1 Si Argon Ar Third shell According to the section of the Periodic Table of Elements above, which element is most likely to have similar chemical properties to carbon Selected Answer: C. Phosphorus Answers:...
3. Selected symbols have been placed into the blank Periodic Table of the Elements, above. Match...
3. Selected symbols have been placed into the blank Periodic Table of the Elements, above. Match the symbol to the following descriptions. Use an element symbol only once. a) a halogen b) a semimetal c) an element in the lanthanide d) an element with atomic number 13 e) an alkali element f) a nonmetal left of the semimetals in the periodic table g) an element in the actinide series h) a representative non-metal in the fourth period i) a noble...
FirstName Date La Teskore for Summer 2018 Chem 1. Write the names and symbols of first...
FirstName Date La Teskore for Summer 2018 Chem 1. Write the names and symbols of first 20 elements (1-20) in order. (10 points) 2. Write the group lA elements (3 or more). Are they nonmetal or metal? (4pts) 3. Write the group VIlIA elements (3 or more). Are they metal or nonmetal? (4pts) 4. 1D the significant figures:(4pts) 10.1203 : 0.0052 : calculate 100.01 1.11112 5. Homogeneous mixtures are also known as(4pts) A) solids; B) compounds; C) elements; D) substances;...
14. Using the periodic table, write the name and symbol of the element with the following...
14. Using the periodic table, write the name and symbol of the element with the following atomic number: a. Z-28 b. Z= 13 c. Z-88 d. Z-33 e. Z- 50 15. Complete the following table for the three naturally occurring isotopes of silicon, the major component in computer chips: Atomic Number Mass Number Number of Protons Number of Neutrons Number of Electrons 16. Write the electron arrangement for each of the following elements and determine group and period. а. охудen...
13) Which of the following is the correct classification for both calcium and iron? A) Ca...
13) Which of the following is the correct classification for both calcium and iron? A) Ca is a transition element and a metal and Fe is a transition element and a metal B) Ca is a transition element and a metal and Fe is a transition element and a nonmetal. C) Ca is an alkali metal element and a metal and Fe is a transition element and a nonmetal D) Ca is an alkaline earth element and a metal and...
8. Why does carbon contain only 4 valence electrons when it has 6 total electrons? 9.True...
8. Why does carbon contain only 4 valence electrons when it has
6 total electrons?
9.True or False. Oxygen and sulfur have the same number of
valence electrons.
10. True or False. Beryllium and magnesium have the same number
of valence electrons.
11. True or False. Sodium and magnesium have the same number of
valence electrons.
12. What is the relationship between the number of valence
electrons and the column on the periodic table?
13. How is the number of...
9. Which elements have a partially filled p sublevel in their electron configuration? or files A) alkali metals B)...
9. Which elements have a partially filled p sublevel in their electron configuration? or files A) alkali metals B) alkaline earth metals C) halogens D) noble gases E) transition metals 1st 3 CHEM 1 10. Which element has the abbreviated electron configuration [Ne]3s23pl? Α) ΑΙ B) P C ) Si DCI E) Ar 11. What is the abbreviated electron configuration for Fe? A) [Ar]4s9 B) [Ar]3d C) [Ar]45236 D) [Ar]4:24p6401 E) [Ar]4,2347
9. Explain why ionization energy decreases as you move down the noble gases from Helium to...
9. Explain why ionization energy decreases as you move down the noble gases from Helium to argon. 10. Sodium atoms are much larger than chlorine atoms, but sodium ions are much smaller than chloride ions. Why? 11. Compounds have been made from Xenon and Krypton, but not from other noble gases. Give a reason why you think this is true. 12. Based on energy changes involved in forming ions, why does Copper form both Cut and Cu2 ions but Sodium...
Quiz #1A Name Good Luck 1. What term is used to describe atoms of the same...
Quiz #1A Name Good Luck 1. What term is used to describe atoms of the same element that have different A. radioactive B. constituents C_isotopes D. telomers E. isomers 2. What is always true for a neutral atom? 5 pts masses? 5 pts A. There is an equal number of protons and neutroes. C. There is an equal number of protons, neutrons, and electrons. D. The namber of protons B_There is an equal number of prosons and clectrons E. The...
Hydrogen - Atomic number Helium - He He 4.00 First Mass number Element symbol shell Electron- distribution diagram Lithium Beryllium Be Boron Carbon Fluorine 6C Nitrogen N Neon 10 Ne Second shell Silicon Sodium 11 Na Aluminum Phosphorus Magnesium 12 Mg Chlorine 17C1 Argon 18Ar 14Si 1SP Third shell According to the section of the Periodic Table of Elements above, which element is most likely to have similar chemical properties to carbon? A. Nitrogen OB. Silicon C. Phosphorus D. Boron
Hydrogen 1H 2- Atomic number He Helium - He Mass number First shell Element symbol- Electron- distribution diagram Lithium Beryllium Carbon Boron 3B Oxygen Nitrogen en N Fluorine انار Neon Be 10 Ne Second shell Sodium 11 Na Aluminum AI Sulfur Magnesium 12Mg Chlorine Phosphorus Silicon 1 Si Argon Ar Third shell According to the section of the Periodic Table of Elements above, which element is most likely to have similar chemical properties to carbon Selected Answer: C. Phosphorus Answers:...
3. Selected symbols have been placed into the blank Periodic Table of the Elements, above. Match the symbol to the following descriptions. Use an element symbol only once. a) a halogen b) a semimetal c) an element in the lanthanide d) an element with atomic number 13 e) an alkali element f) a nonmetal left of the semimetals in the periodic table g) an element in the actinide series h) a representative non-metal in the fourth period i) a noble...
FirstName Date La Teskore for Summer 2018 Chem 1. Write the names and symbols of first 20 elements (1-20) in order. (10 points) 2. Write the group lA elements (3 or more). Are they nonmetal or metal? (4pts) 3. Write the group VIlIA elements (3 or more). Are they metal or nonmetal? (4pts) 4. 1D the significant figures:(4pts) 10.1203 : 0.0052 : calculate 100.01 1.11112 5. Homogeneous mixtures are also known as(4pts) A) solids; B) compounds; C) elements; D) substances;...
14. Using the periodic table, write the name and symbol of the element with the following atomic number: a. Z-28 b. Z= 13 c. Z-88 d. Z-33 e. Z- 50 15. Complete the following table for the three naturally occurring isotopes of silicon, the major component in computer chips: Atomic Number Mass Number Number of Protons Number of Neutrons Number of Electrons 16. Write the electron arrangement for each of the following elements and determine group and period. а. охудen...
13) Which of the following is the correct classification for both calcium and iron? A) Ca is a transition element and a metal and Fe is a transition element and a metal B) Ca is a transition element and a metal and Fe is a transition element and a nonmetal. C) Ca is an alkali metal element and a metal and Fe is a transition element and a nonmetal D) Ca is an alkaline earth element and a metal and...
8. Why does carbon contain only 4 valence electrons when it has
6 total electrons?
9.True or False. Oxygen and sulfur have the same number of
valence electrons.
10. True or False. Beryllium and magnesium have the same number
of valence electrons.
11. True or False. Sodium and magnesium have the same number of
valence electrons.
12. What is the relationship between the number of valence
electrons and the column on the periodic table?
13. How is the number of...
9. Which elements have a partially filled p sublevel in their electron configuration? or files A) alkali metals B) alkaline earth metals C) halogens D) noble gases E) transition metals 1st 3 CHEM 1 10. Which element has the abbreviated electron configuration [Ne]3s23pl? Α) ΑΙ B) P C ) Si DCI E) Ar 11. What is the abbreviated electron configuration for Fe? A) [Ar]4s9 B) [Ar]3d C) [Ar]45236 D) [Ar]4:24p6401 E) [Ar]4,2347
9. Explain why ionization energy decreases as you move down the noble gases from Helium to argon. 10. Sodium atoms are much larger than chlorine atoms, but sodium ions are much smaller than chloride ions. Why? 11. Compounds have been made from Xenon and Krypton, but not from other noble gases. Give a reason why you think this is true. 12. Based on energy changes involved in forming ions, why does Copper form both Cut and Cu2 ions but Sodium...
Quiz #1A Name Good Luck 1. What term is used to describe atoms of the same element that have different A. radioactive B. constituents C_isotopes D. telomers E. isomers 2. What is always true for a neutral atom? 5 pts masses? 5 pts A. There is an equal number of protons and neutroes. C. There is an equal number of protons, neutrons, and electrons. D. The namber of protons B_There is an equal number of prosons and clectrons E. The...
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