05:04Nuclide Symbols: Atomic Number, Mass Number, Ions, and IsotopesProfessor Dave Explains845views1rank
Multiple ChoiceBased on the number of protons each element has, which would you expect to be chemically similar?503views2rankHas a video solution.
Textbook QuestionThe prefix eka- comes from the Sanskrit word for 'one.' Mendeleev used this prefix to indicate that the unknown element was one place away from the known element that followed the prefix. For example, eka-silicon, which we now call germanium, is one element below silicon. Mendeleev also predicted the existence of eka-manganese, which was not experimentally confirmed until 1937 because this element is radioactive and does not occur in nature. Based on the periodic table shown in Figure 7.1, what do we now call the element Mendeleev called eka-manganese?1703views1rankHas a video solution.
Textbook QuestionGive the chemical symbol or name for the following elements, as appropriate: (c) cobalt370viewsHas a video solution.
Textbook QuestionGive the chemical symbol or name for each of the following elements, as appropriate: (a) rhenium707viewsHas a video solution.
Textbook QuestionThe element indicated on the following periodic table is used in smoke detectors. Identify it, give its atomic number, and tell what kind of group it's in.252viewsHas a video solution.
Textbook QuestionFor each of the following elements, write its chemical symbol, locate it in the periodic table, give its atomic number, and indicate whether it is a metal, metalloid, or nonmetal: (g) sulphur.926viewsHas a video solution.
Textbook QuestionHow many elements are presently known? About how many occur naturally?604viewsHas a video solution.
Textbook QuestionLook at the alphabetical list of elements inside the front cover. What are the symbols for the following elements? (a) Gadolinium (used in color TV screens) (b) Germanium (used in semiconductors) (c) Technetium (used in biomedical imaging) (d) Arsenic (used in pesticides)212viewsHas a video solution.
Textbook QuestionLook at the alphabetical list of elements inside the front cover. What are the symbols for the following elements? (a) Cadmium (used in rechargeable Ni-cad batteries) (b) Iridium (used for hardening alloys) (c) Beryllium (used in the space shuttle) (d) Tungsten (used in light bulbs)400viewsHas a video solution.
Textbook QuestionLook at the alphabetical list of elements inside the front cover. Give the names corresponding to the following symbols: (a) Te (b) Re (c) Be (d) Ar (e) Pu351viewsHas a video solution.
Textbook QuestionLook at the alphabetical list of elements inside the front cover. Give the names corresponding to the following symbols: (a) B (b) Rh (c) Cf (d) Os (e) Ga294viewsHas a video solution.
Textbook QuestionWhat is wrong with each of the following statements? (a) The symbol for tin is Ti. (b) The symbol for manganese is Mg. (c) The symbol for potassium is Po. (d) The symbol for helium is HE.329viewsHas a video solution.
Textbook QuestionWhat is wrong with each of the following statements? (a) The symbol for carbon is ca. (b) The symbol for sodium is So. (c) The symbol for nitrogen is Ni. (d) The symbol for chlorine is Cr275viewsHas a video solution.
Textbook QuestionExamine Figure 2.2, A portion of Mendeleev's periodic table. How was Mendeleev able to predict with a high level of accuracy the properties of the undiscovered elements beneath Al and Si in the periodic table?317viewsHas a video solution.
Textbook QuestionExamine Figure 2.2, A portion of Mendeleev's periodic table. (a) Which characteristic was used to organize the elements in the table?209viewsHas a video solution.
Textbook QuestionExamine Figure 2.3, The periodic table. (g) What is the symbol for the element located in period 3, group 4A?619viewsHas a video solution.
Textbook QuestionIn which of the periodic groups 1A, 2A, 5A, and 7A is the first letter of all elements' symbol the same as the first letter of their name?520viewsHas a video solution.
Textbook QuestionConsider the stable elements through lead 1Z = 822. In how many instances are the atomic weights of the elements out of order relative to the atomic numbers of the elements?322viewsHas a video solution.
Textbook QuestionThe subscript giving the atomic number of an atom is often left off when writing an isotope symbol. For example, 6 often written simply as 13C. Why is this allowed?777viewsHas a video solution.
Textbook QuestionGive the names and symbols for the following elements: (a) An element with atomic number 6 (b) An element with 18 protons in its nucleus (c) An element with 23 electrons1010views1rankHas a video solution.
Open QuestionWhat is the significance of the periodic table of elements? Choose the best answer.50viewsHas a video solution.
Open QuestionWhich element is placed in the same period as ruthenium but has a higher atomic number than it?41viewsHas a video solution.
Open QuestionThe symbol for xenon (Xe) would be a part of the noble gas notation for the element.58viewsHas a video solution.
Open QuestionWhat is the atomic symbol for the element in group 4B (4) and the fourth period?38viewsHas a video solution.
Open QuestionHow is today's periodic table different from the one that Mendeleev published?35viewsHas a video solution.
Open QuestionAfter Mendeleev organized the periodic table by atomic weight, he noticed a pattern of ....?28viewsHas a video solution.
Open QuestionA russian chemist developed the periodic table as a way to group elements and atoms according to26viewsHas a video solution.
Open QuestionIdentify the chemical symbols for the elements carbon, aluminum, hydrogen, oxygen, and sodium.32viewsHas a video solution.
Open QuestionWhat is the chemical symbol for the group 6a 16 element that lies in period 4?37viewsHas a video solution.