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9. The correct formula for barium chloride is c) salt a) Baci b) Baci c) BaCl....
(Protected View) - Word Protected View Enable Editing B. groups C. rows. D. metals. 5. The...
(Protected View) - Word Protected View Enable Editing B. groups C. rows. D. metals. 5. The most numerous of the elements are the A. metals. B. nonmetals. C. metalloids. D. noble gases. 6. Which is not a mixture? A. A jar filled with rocks and sand B. Sea water C. A glass of Kool-Aid D. Sodium chloride 7. Which is not a pure substance? A. Helium B. Copper wire C. Air D. Sucrose 8. Which differentiates a compound from a...
Boron has atomic number 5. It comprises two isotopes, one with five neutrons, the other with...
Boron has atomic number 5. It comprises two isotopes, one with five neutrons, the other with six. a) Define the term "isotope". b) Calculate the mass numbers of the two isotopes and represent them in the form In naturally occurring boron, 20% of the atoms contain five neutrons and 80% six neutrons. Calculate relative atomic mass of boron. Given the atomic numbers of the following elements, write their simple electronic structures: a) Beryllium (AL No.24) b) Aluminium (At. No. 13)...
Please answer ALL of the following questions!!! Thanks!!! And please briefly explain how you got the...
Please answer ALL of the following questions!!!
Thanks!!! And please briefly explain how you got the answer to each
question.
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The trend for electronegativity values decreases A. Down a group and left to right across a period B. Up a group and left to right across a period Down a group and right to left across a period D.Up a group and...
B) Theories must be testable; hypotheses do not need to be testable. CHypotheses are educated guesses,...
B) Theories must be testable; hypotheses do not need to be testable. CHypotheses are educated guesses, and theories are tentative explanations. D) Hypotheses are derived from experimentation, whereas theories are derived from observation. 12) A) Water is an example of an element. B Nitrogen C) Glucose D) Salt 13) What are the four most common elements found in living organisms? A) nitrogen, oxygen, phosphorus, and carbon carbon, oxygen, nitrogen, and hydrogen C) carbon, oxygen, potassium, and calcium D) oxygen, calcium,...
I. Carbon atoms are about 25% lighter than oxygen atoms (the ratio of their weights is...
I. Carbon atoms are about 25% lighter than oxygen atoms (the ratio of their weights is 3 to 4). What is the weight ratio of the carbon and oxygen that go into the formation of carbon monoxide, CO? (a) 4 parts carbon to 3 parts oxygen (b) 1 part carbon to 4 parts oxygen (c) 1 part carbon to 1 part oxygen (d) 4 parts carbon to 1 part oxygen (e) 3 parts carbon to 4 parts oxygen 2. How...
18) From the following elements, one is not naturally diatomic molecule b- Nitrogen a-Oxygen d- Copper c- lodine 19...
18) From the following elements, one is not naturally diatomic molecule b- Nitrogen a-Oxygen d- Copper c- lodine 19) In the element Radium Ra, the number of protons, neutrons and electrons are respectively b-88, 88, 226 a- 88, 138, 88 d- 138, 88, 88 c-88, 226, 88 20) The empirical formulas of glucose CaHi:O, is b- CHO a- CiaHaO12 d-CH O c-CH:0 21) The compound NHa is a: b-A polyatomic cation a- A monoatomic cation d-A polyatomic anion c- A...
Problem 1. Label each of the following items as an ionic compound. molecule: (a) LiCI (b)...
Problem 1. Label each of the following items as an ionic compound. molecule: (a) LiCI (b) H2O (c) NaF element, or : (a) Problem 2. Label each of the following items as an ionic compound. molecule: (a) CO2: (b) CaO; (c) N2. Ans: (a) Problem 3. Write the ion symbol for an atom with the given number of protons and electrons: (a) 11 protons and 10 electrons; (b) 35 protons and 36 electrons; (c) 7 pro- tons and 10 electrons....
11. Which one of these elements is not a gas at room temperature? A. chlorine B....
11. Which one of these elements is not a gas at room temperature? A. chlorine B. fluorine C. nitrogen D. oxygen E. sulfur 22. Determine all of the ionic compounds from the compounds listed below. I. CaH2 II. H2S III. SiH4 A. I only B. II only C. I and II D. I and III E. II and III 32. Based on the following options, select the substance with hydrogen in the +1 oxidation state. A. KH B. CH4 C....
9) in the accompanying phase diapom, . LauD may be present at a) A, B, C...
9) in the accompanying phase diapom, . LauD may be present at a) A, B, C and G b)A, CG and D GC D andE d) A and C only ejA,C. D and 10) The normal boling point of a liquid is al the only temperature at which there carn b) the temperature above which the substance cannot exist as a c) the temperature at which gas d) the temperature at which the vapor be equiliterium between the liquid and...
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...
(Protected View) - Word Protected View Enable Editing B. groups C. rows. D. metals. 5. The most numerous of the elements are the A. metals. B. nonmetals. C. metalloids. D. noble gases. 6. Which is not a mixture? A. A jar filled with rocks and sand B. Sea water C. A glass of Kool-Aid D. Sodium chloride 7. Which is not a pure substance? A. Helium B. Copper wire C. Air D. Sucrose 8. Which differentiates a compound from a...
Boron has atomic number 5. It comprises two isotopes, one with five neutrons, the other with six. a) Define the term "isotope". b) Calculate the mass numbers of the two isotopes and represent them in the form In naturally occurring boron, 20% of the atoms contain five neutrons and 80% six neutrons. Calculate relative atomic mass of boron. Given the atomic numbers of the following elements, write their simple electronic structures: a) Beryllium (AL No.24) b) Aluminium (At. No. 13)...
Please answer ALL of the following questions!!!
Thanks!!! And please briefly explain how you got the answer to each
question.
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
11)
12)
13)
14)
15)
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18)
The trend for electronegativity values decreases A. Down a group and left to right across a period B. Up a group and left to right across a period Down a group and right to left across a period D.Up a group and...
B) Theories must be testable; hypotheses do not need to be testable. CHypotheses are educated guesses, and theories are tentative explanations. D) Hypotheses are derived from experimentation, whereas theories are derived from observation. 12) A) Water is an example of an element. B Nitrogen C) Glucose D) Salt 13) What are the four most common elements found in living organisms? A) nitrogen, oxygen, phosphorus, and carbon carbon, oxygen, nitrogen, and hydrogen C) carbon, oxygen, potassium, and calcium D) oxygen, calcium,...
I. Carbon atoms are about 25% lighter than oxygen atoms (the ratio of their weights is 3 to 4). What is the weight ratio of the carbon and oxygen that go into the formation of carbon monoxide, CO? (a) 4 parts carbon to 3 parts oxygen (b) 1 part carbon to 4 parts oxygen (c) 1 part carbon to 1 part oxygen (d) 4 parts carbon to 1 part oxygen (e) 3 parts carbon to 4 parts oxygen 2. How...
18) From the following elements, one is not naturally diatomic molecule b- Nitrogen a-Oxygen d- Copper c- lodine 19) In the element Radium Ra, the number of protons, neutrons and electrons are respectively b-88, 88, 226 a- 88, 138, 88 d- 138, 88, 88 c-88, 226, 88 20) The empirical formulas of glucose CaHi:O, is b- CHO a- CiaHaO12 d-CH O c-CH:0 21) The compound NHa is a: b-A polyatomic cation a- A monoatomic cation d-A polyatomic anion c- A...
Problem 1. Label each of the following items as an ionic compound. molecule: (a) LiCI (b) H2O (c) NaF element, or : (a) Problem 2. Label each of the following items as an ionic compound. molecule: (a) CO2: (b) CaO; (c) N2. Ans: (a) Problem 3. Write the ion symbol for an atom with the given number of protons and electrons: (a) 11 protons and 10 electrons; (b) 35 protons and 36 electrons; (c) 7 pro- tons and 10 electrons....
9) in the accompanying phase diapom, . LauD may be present at a) A, B, C and G b)A, CG and D GC D andE d) A and C only ejA,C. D and 10) The normal boling point of a liquid is al the only temperature at which there carn b) the temperature above which the substance cannot exist as a c) the temperature at which gas d) the temperature at which the vapor be equiliterium between the liquid and...
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...
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