Chemistry: Chapter 3: Question Preview (ID: 21486)


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what information in the periodic table indicates the number of protons in an atom?
a) the position of the element in its column b) the element's chemical symbol c) the element's atomic number d) the element's atomic mass
Most metals are not
a) ductile b) good conductors c) liquid at room temperature d) malleable
In which part of an atom are the valence electrons located?
a) inside the nucleus b) closest to the nucleus c) furthest from the nucleus d) throughout the entire atom
At room temperature, more than half of the nonmetal elements are
a) alloys b) gases c) liquids d) solids
Which of the following statements about metals is true?
a) metals need to be stored in sealed containers for safety b) metals show a wide range of chemical properties c) metals are highly reactive substances d) metals do not react with oxygen
Mendeleev created the first periodic table by arranging the elements in order by
a) decreasing atomic mass b) increasing atomic mass c) increasing atomic number d) increasing melting points and densities
In the periodic table, the most reactive metals are found
a) in group 1, the first column on the left b) in period 1, the first row across the top c) in groups 13-16 in the center d) in periods 6 and 7 at the bottom
Which member of the carbon family is a non metal
a) carbon b) silicon c) tin d) lead
The elements in a row of the periodic table
a) are in the same family b) have the same or nearly the same properties c) have the same average atomic mass d) are in the same period
Which group contains the most elements?
a) metalloids b) nonmetals c) metals d) transition elements
The atomic number of an element is based on the
a) mass of its nucleus b) number of electrons around its core c) number of protons in its nucleus d) number of neutrons in its nucleus
Which group of elements share characteristics with both metals and nonmetals?
a) salt b) metalloids c) halogens d) alloys
Which of these statements is true about a column of the periodic table?
a) the elements have similar properties b) the elements have a wide range of properties c) the elements have the same atomic number d) the elements have the same atomic mass
Which part(s) of the atom move around the nucleus?
a) Atomic mass units b) electrons c) protons d) neutrons
What prediction did Mendeleev make that came true less than 20 years later?
a) he predicted the atomic number of unknown elements b) he predicted that a total of 112 elements would be discovered c) he said that three new elements would be discovered and he described their properties d) he said that the periodic table would be developed into 19 families
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