(a)
Interpretation:
Silicon is the second-most abundant element in Earth’s crust has to be indicated true or false.
Concept Introduction:
Element is a pure substance and it cannot be broken down into simpler pure substance by chemical means like
Elements that are laboratory synthesized are radioactive in nature and they convert back into the original naturally occurring element by emission of radiation. All the elements that occur naturally are not evenly distributed on earth and universe.
Radiations that are emitted from stars can be used to estimate the elemental composition of universe. This indicates that hydrogen and helium are mostly dominant. On Earth’s crust oxygen and silicon are the two elements that account for about
(b)
Interpretation:
Hydrogen is the most abundant element in universe but not in Earth’s crust has to be indicated true or false.
Concept Introduction:
Element is a pure substance and it cannot be broken down into simpler pure substance by chemical means like chemical reaction, electric current, heat, or light. Over several centuries, the discovery of 118 known elements and its isolation have taken place. These 118 elements are the building blocks of all matter. Out of the 118 elements, eighty-eight elements are naturally occurring and the other 30 elements are laboratory synthesized by bombarding elements that naturally occur with small particles.
Elements that are laboratory synthesized are radioactive in nature and they convert back into the original naturally occurring element by emission of radiation. All the elements that occur naturally are not evenly distributed on earth and universe.
Radiations that are emitted from stars can be used to estimate the elemental composition of universe. This indicates that hydrogen and helium are mostly dominant. On Earth’s crust oxygen and silicon are the two elements that account for about
(c)
Interpretation:
Oxygen and hydrogen are the two most abundant element in the universe has to be indicated true or false.
Concept Introduction:
Element is a pure substance and it cannot be broken down into simpler pure substance by chemical means like chemical reaction, electric current, heat, or light. Over several centuries, the discovery of 118 known elements and its isolation have taken place. These 118 elements are the building blocks of all matter. Out of the 118 elements, eighty-eight elements are naturally occurring and the other 30 elements are laboratory synthesized by bombarding elements that naturally occur with small particles.
Elements that are laboratory synthesized are radioactive in nature and they convert back into the original naturally occurring element by emission of radiation. All the elements that occur naturally are not evenly distributed on earth and universe.
Radiations that are emitted from stars can be used to estimate the elemental composition of universe. This indicates that hydrogen and helium are mostly dominant. On Earth’s crust oxygen and silicon are the two elements that account for about
(d)
Interpretation:
One element accounts for over one-half of atoms in Earth’s crust has to be indicated true or false.
Concept Introduction:
Element is a pure substance and it cannot be broken down into simpler pure substance by chemical means like chemical reaction, electric current, heat, or light. Over several centuries, the discovery of 118 known elements and its isolation have taken place. These 118 elements are the building blocks of all matter. Out of the 118 elements, eighty-eight elements are naturally occurring and the other 30 elements are laboratory synthesized by bombarding elements that naturally occur with small particles.
Elements that are laboratory synthesized are radioactive in nature and they convert back into the original naturally occurring element by emission of radiation. All the elements that occur naturally are not evenly distributed on earth and universe.
Radiations that are emitted from stars can be used to estimate the elemental composition of universe. This indicates that hydrogen and helium are mostly dominant. On Earth’s crust oxygen and silicon are the two elements that account for about
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EBK GENERAL, ORGANIC, AND BIOLOGICAL CH
- Miller and Urey created a reaction chamber that simulated conditions in Earths early atmosphere to test the hypothesis that______. a. lightning-fueled atmospheric reactions could have produced organic compounds b. meteorites contain organic compounds c. organic compounds form at hydrothermal vents d. oxygen prevents formation of organic compoundsarrow_forwardA. The first shell corresponds to the first energy level, and it can hold up to 2 electrons. Hydrogen has one proton, so it has 1 electron and one vacancy. A helium atom has 2 protons, 2 electrons, and no vacancies. B. The second shell corresponds to the second energy level, and it can hold up to 8 electrons. Carbon has 6 electrons, so its first shell is full. Its second shell has 4 electrons and four vacancies. Oxygen has 8 electrons and two vacancies. Neon has 10 electrons and no vacancies. C. The third shell corresponds to the third energy level, and it can hold up to 8 electrons. A sodium atom has 11 electrons, so its first two shells are full; the third shell has one electron. Thus, sodium has seven vacancies. Chlorine has 17 electrons and one vacancy. Argon has 18 electrons and no vacancies. Figure It Out: Which of these models have unpaired electrons in their outer shell?arrow_forwardRefer to the following figure (first three rows of the periodic table) to answer the questions below. What element does not react with other elements? Group of answer choices A. hydrogen B. helium C. oxygen D. siliconarrow_forward
- Which of the following statements is not true? a. Water is polar. b. Water stabilizes temperature. c. Water is essential for life. d. Water is the most abundant molecule in the Earth’s atmosphere.arrow_forwardThe most abundant element by weight in the human body is a. carbon. b. hydrogen. c. oxygen.d. nitrogen.arrow_forwardThe smallest particle of an element that still has the chemical characteristics of that element is a(n)a. electron. c. neutron. e. atom.b. molecule. d. proton.arrow_forward
- Isotopes differ from each other only in the number of electrons they contain. Select one: a. True b. Falsearrow_forwardA molecule of water is formed when one atom of oxygen is covalently bonded with two atoms of hydrogen. What is the total number of electron pairs that must be shared between the oxygen atom and the hydrogen atoms in order to complete the outer electron shell of all three atoms? a.2 b.3 c.4 d.1 e.5arrow_forwardDefine the following terms: a. metalloprotein b. primary structure c. secondary structure d. tertiary structure e. quaternary structurearrow_forward
- The percentages of naturally occurring elements making up the human body (see Table 2.1) are similar to the percentages of these elements found in other organisms. How could you account for this similarity among organisms?arrow_forwardAtoms are incredibly tiny, so small that most microscopes can't even see them, but atoms themselves are made of even smaller particles: protons, neutrons, and electrons. Which of the following describes where protons are located in an atom? A. A shell B. The nucleus C. Both the nucleus and a shellarrow_forward1. Which of the following is true of oxygen that has 8 protons, 8 neutrons, and 8 electrons? A. It has a charge of +8. B. It has a mass number of 8. C. It has an atomic number of 8. D. It has atomic number of 16. 2. Trace elements are those required by an organism in only minute quantities. Which of the following is a trace element that is required by all forms of life? A. arsenic B. iodine C. mercury D. ironarrow_forward
- Biology Today and Tomorrow without Physiology (Mi...BiologyISBN:9781305117396Author:Cecie Starr, Christine Evers, Lisa StarrPublisher:Cengage Learning