02:20Atomic Structure And Electrons - Structure Of An Atom - What Are Atoms - Neutrons Protons ElectronsWhats Up Dude817views
Multiple ChoiceA proton ___________:a) Has one positive charge.b) Has one AMU.c) Is found in the nucleus of the atom.d) Only a and b are true.e) a, b, and c are true.4539views99rank
Multiple ChoiceThe average oxygen atom has a mass number of 16 and an atomic number of 8. This means that the number of neutrons in this oxygen atom is:a) 24.b) 8.c) 16.d) 4.e) 2.6031views71rank
Multiple ChoiceHow many valence electrons does an atom with five total electrons have?a) 5.b) 7.c) 3.d) 2.e) 1.4355views49rank
Multiple ChoiceWhich of the following is true about electron energy shells?a) They represent regions around the nucleus in which the electrons orbit.b) The shells closest to the nucleus contain electrons with higher energy.c) They contain electrons of the same energy.d) a and b only.e) a and c only.3749views52rank
Multiple ChoiceA neon atom (Ne) is unreactive for which of the following reasons?a) It has 7 valence electrons.b) It has 8 valence electrons.c) Its valence shell is full of electrons. d) It has 20 valence electrons.e) b and c only.3652views37rank1comments
Multiple ChoiceHow many electrons does an Oxygen atom need to fulfill the octet rule by filling its valence shell?a) 8.b) 4.c) 1.d) 2.e) 6.3852views65rank1comments
Multiple ChoiceWhich of the following subatomic particles has appreciable mass but no charge? 1086views2rank
Multiple ChoiceIf you were told that concentrations of trace elements above what is required by organisms generally have no effect on those organisms, what would you say? 959views
Multiple ChoiceAn element has eight protons, nine neutrons, and eight electrons. Its atomic number and atomic mass, respectively, are __________. 1837views
Multiple ChoiceA neutral atom of chlorine has an atomic number of 17. It has __________ electrons in its third shell.1557views
Multiple ChoiceHow many electrons would be present in the valence shell of a sulfur atom (atomic number 16, mass number 32)?1680views2comments
Textbook QuestionIn the term trace element, the adjective trace means that a. the element is required in very small amounts. b. the element can be used as a label to trace atoms through an organism's metabolism. c. the element is very rare on Earth. d. the element enhances health but is not essential for the organism's long-term survival.1388views1rank
Textbook QuestionFill in the blanks in this concept map to help you tie together the key concepts concerning elements, atoms, and molecules. 1521views
Textbook QuestionWe can be sure that a mole of table sugar and a mole of vitamin C are equal in their a. mass. b. volume. c. number of atoms. d. number of molecules.1224views1rank
Textbook QuestionThe reactivity of an atom arises from a. the average distance of the outermost electron shell from the nucleus. b. the existence of unpaired electrons in the valence shell. c. the sum of the potential energies of all the electron shells. d. the potential energy of the valence shell.1308views
Textbook QuestionChanging the _________ would change it into an atom of a different element. a. number of electrons surrounding the nucleus of an atom b. number of protons in the nucleus of an atom c. electrical charge of an atom d. number of neutrons in the nucleus of an atom1264views
Textbook QuestionAdd labels to the figure that follows, which illustrates the subatomic particles associated with a carbon atom. 1170views
Textbook QuestionElectrons . a. are negatively charged; b. along with neutrons make up the nucleus; c. are attracted to the negatively charged nucleus; d. are not involved in ionic bonds; e. all of the above are true1011views
Textbook QuestionIn what way does the need for iodine or iron in your diet differ from your need for calcium or phosphorus?955views
Textbook QuestionDRAW IT Draw Lewis dot structures for each hypothetical molecule shown below, using the correct number of valence electrons for each atom. Determine which molecule makes sense because each atom has a complete valence shell and each bond has the correct number of electrons. Explain what makes the other molecule nonsensical, considering the number of bonds each type of atom can make. a.1185views
Textbook QuestionUse carbon-12, the most common isotope of carbon, to define these terms: atomic number, mass number, valence. Which of these numbers is most related to the chemical behavior of an atom? Explain.1338views
Textbook QuestionLook back at the abbreviated periodic table of the elements in Figure 2.5B. If two elements are in the same row, what do they have in common? If two elements are in the same column, what do they have in common? Would you predict that elements in the same row or the same column will have similar chemical properties? Explain. 837views
05:05
