The Simplest Matter: Question Preview (ID: 268)

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An example of a synthetic element is __________.
a) nitrogen
b) aluminum
c) iron
d) plutonium

The __________ is a chart created by chemists to organize the elements.
a) mass number
b) periodic table
c) isotope
d) metalloid list

An element's atomic number is the number of __________ in the nucleus of each atom of that element.
a) neutrons
b) electrons
c) protons
d) positrons

The atomic number of manganese is 25; its mass number is 55. How many neutrons does an atom of manganese have in its nucleus?
a) 25
b) 55
c) 30
d) 80

Atoms of the same element that have different numbers of neutrons are called?
a) isotopes
b) metals
c) nonmetals
d) metalloids

Which of the following best describes the three general groups of elements?
a) metal, metalloids, and nonmetals
b) metals, nonmetals, and noble gases
c) metals, metalloids, and synthetics
d) solid, liquid, and gas

Which of the following is characteristic of most metals?
a) dull in appearance
b) poor conductors of electricity
c) shiny luster
d) gases at room temperature

What group contains elements that are gases at room temperature?
a) metals
b) nonmetals
c) metalloids
d) isotopes

The atomic mass of an element is __________ of that element.
a) the number of protons plus the number of neutrons of an atom
b) the number of protons in each atom
c) the average mass of an atom
d) the number of electrons in each atom

An atom containing six positive charges and six negative charges has __________ charge.
a) a positive
b) a negative
c) no net
d) a strong negative

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