Homework Answers
Note: Only the first four questions/parts can be answered at once. Therefore, the first four (1-4) question no. are answered with proper explanations.
Question 01:
Answer: Option D) Iron.
Explanation: Carbon, hydrogen, oxygen, nitrogen, phosphorus, and sulfur are the six elements which make up 95% of the bodyweight of organisms. Iron is a micro-nutrient and doesn't have a high percentage of content in organisms.
Question 02:
Answer: Option C) All isotopes have the same number of protons.
Explanation: Isotopes have the same number of protons which is the reason that they have the same atomic number although they have different mass numbers because they have different numbers of neutrons.
Question 03:
Answer: Option B) Covalent.
Explanation: When atoms share electrons then covalent bonds are formed. Hydrogen bonds are dipole-dipole attraction between molecules. An ionic bond is a bond formed between a positive and negative charged ions.
Question 04:
Answer: Option B) Stomach antacids.
Explanation: Stomach antacids are used to treat excess acid in the stomach by neutralizing it. Therefore, it is basic. The other given options are all acidic substances.
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Which of the following is NOT one of the six elements that make up 95% of...
..ll T-Mobile 2:05 PM 29% 12) of the four elements most prevalent in living organisms, which...
..ll T-Mobile 2:05 PM 29% 12) of the four elements most prevalent in living organisms, which element makes up the highest percentage? A) sulfur B) sodium C) oxygen D) potassium E) carbon 13) An atom of an element has atomic number of 6 and mass number of 14. From this information, we can determine that the nucleus has : A) 6 protons. B) 8 electrons. C) 8 neutrons. D) 6 protons and 8 electrons. E) 6 protons and 8 neutrons....
1) Define the following: matter, element, atom, trace element, proton, electron, neutron, atomic number, mass number,...
1) Define the following: matter, element, atom, trace element, proton, electron, neutron, atomic number, mass number, isotopes, radioisotope, molecule, compound, salt, ion. 2) List the 6 elements that make up about 99% of the weight of an organism. 3) What are the functions of the trace elements iron, fluorine (fluoride), and iodine? 4) An iodine deficiency can result in goiter. True/False 5) Where are protons, neutrons and electrons located? 6) Can you determine the atomic number and mass number from...
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,...
Atoms and Isotopes 1 Activity: Atoms and Isotopes Why? Atoms and isotopes are identified by the...
Atoms and Isotopes 1 Activity: Atoms and Isotopes Why? Atoms and isotopes are identified by the numbers of protons, electrons, and neutrons that they contain The number of protons, electrons, and neutrons in atoms determines the chemical properties of the elements .A knowledge of the number of protons and electrons in an atom will help you understand how atoms combine to form molecules Identify the composition of atoms in terms of protons, neutrons, and electrons Use atomic symbols to represent...
These questions are to guide your studying. They do not cover all of the topics that...
These questions are to guide your studying. They do not cover all of the topics that may be on exams. Using the Internet, find out how many isotopes of Carbon exist in nature. Which are the three most abundant? Consult a periodic table. Determine the atomic numbers and mass numbers for: An atom of oxygen with 8 neutrons. An atom of Phosphorus with two more neutrons than protons. An atom of Aluminum with 14 neutrons.^32P is an unstable isotope of...
10. If you pour water in a glass cylinder, you see upper and lower meniscus. If...
10. If you pour water in a glass cylinder, you see upper and lower meniscus. If you use a plastic cylinder, the surface appears flat. Which of the following properties of water is responsible for the formation of the meniscus? High heat of vaporization Cohesion and Adhesion Excellent solubility maintenance of pH 17. If you were to make 200 mL of 3% sugar solution, how much sugar would you have to weigh? 2 g 12 g 6 g 1.5 g...
65) The nucleus of an atom contains: a) protons and electrons b) just electrons c) electrons and neutrons d) proton...
65) The nucleus of an atom contains: a) protons and electrons b) just electrons c) electrons and neutrons d) protons and neutrons e) neutrons 66) The atomic number of an atom is: a) the number of electrons it has b) the number of neutrons it has c) the number of protons it has d) the number of protons plus the number of neutrons it has e) the combined total of protons, neutrons and electrons that it has 67) In water,...
20) Which statement is NOT true about ionic bonds? A) An ionic bond occurs between positive...
20) Which statement is NOT true about ionic bonds? A) An ionic bond occurs between positive ions and negative ions. B) Electrons are completely lost or gained in ion formation An ion has the same number of electrons as a nonionic atom of the same element. D) A salt such as NaCl is formed by an ionic reaction. 21) Which of the following would be a proposed mechanism by which stomach antacids work? A) Antacids are bases and by definition...
For the following elements, give the numbers of protons, neutrons, electrons, atomic number, and mass number....
For the following elements, give the numbers of protons, neutrons, electrons, atomic number, and mass number. a) Rn b) Sulfur-34 isotope Write the correct chemical formula and name of the ionic compound that forms from the following ions: a) Fe3+ and S2- b) Mg2+ abs P3- Write the chemical formula for the following compounds, and indicate which contain covalent bonds. a) Lithium nitride b) Carbon tetrafluoride c) Calcium sulfate
64Chapter 7 Atomic Number and Atomie Mass The Periodie Table of Elements contains th and atomie...
64Chapter 7 Atomic Number and Atomie Mass The Periodie Table of Elements contains th and atomie wumber of protons, e atomic m number of each element. These numbbers indicate the neutrons, and electrons in each element's basic wtructure Each aquare in the Periodic Table represents an element There are two numbers in each square 3 Alomic Number The smaller number at the top of the box is the atomic number The number at the bottom of the box is the...
..ll T-Mobile 2:05 PM 29% 12) of the four elements most prevalent in living organisms, which element makes up the highest percentage? A) sulfur B) sodium C) oxygen D) potassium E) carbon 13) An atom of an element has atomic number of 6 and mass number of 14. From this information, we can determine that the nucleus has : A) 6 protons. B) 8 electrons. C) 8 neutrons. D) 6 protons and 8 electrons. E) 6 protons and 8 neutrons....
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,...
Atoms and Isotopes 1 Activity: Atoms and Isotopes Why? Atoms and isotopes are identified by the numbers of protons, electrons, and neutrons that they contain The number of protons, electrons, and neutrons in atoms determines the chemical properties of the elements .A knowledge of the number of protons and electrons in an atom will help you understand how atoms combine to form molecules Identify the composition of atoms in terms of protons, neutrons, and electrons Use atomic symbols to represent...
These questions are to guide your studying. They do not cover all of the topics that may be on exams. Using the Internet, find out how many isotopes of Carbon exist in nature. Which are the three most abundant? Consult a periodic table. Determine the atomic numbers and mass numbers for: An atom of oxygen with 8 neutrons. An atom of Phosphorus with two more neutrons than protons. An atom of Aluminum with 14 neutrons.^32P is an unstable isotope of...
65) The nucleus of an atom contains: a) protons and electrons b) just electrons c) electrons and neutrons d) protons and neutrons e) neutrons 66) The atomic number of an atom is: a) the number of electrons it has b) the number of neutrons it has c) the number of protons it has d) the number of protons plus the number of neutrons it has e) the combined total of protons, neutrons and electrons that it has 67) In water,...
20) Which statement is NOT true about ionic bonds? A) An ionic bond occurs between positive ions and negative ions. B) Electrons are completely lost or gained in ion formation An ion has the same number of electrons as a nonionic atom of the same element. D) A salt such as NaCl is formed by an ionic reaction. 21) Which of the following would be a proposed mechanism by which stomach antacids work? A) Antacids are bases and by definition...
64Chapter 7 Atomic Number and Atomie Mass The Periodie Table of Elements contains th and atomie wumber of protons, e atomic m number of each element. These numbbers indicate the neutrons, and electrons in each element's basic wtructure Each aquare in the Periodic Table represents an element There are two numbers in each square 3 Alomic Number The smaller number at the top of the box is the atomic number The number at the bottom of the box is the...
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