Periodic Table Quiz

Question 1An isotope has atomic number 14 and mass number 29. How many neutrons does its nucleus contain? Enter a whole number.

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Answers within 0.5 of the expected value are accepted.

Question 2An ion has 12 protons and charge +2. How many electrons does it contain? Enter a whole number.

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Answers within 0.5 of the expected value are accepted.

Question 3A neutral main-group atom belongs to group 16. How many valence electrons does the group pattern indicate? Enter a whole number.

Enter a number.

Answers within 0.5 of the expected value are accepted.

Question 4Hydrogen is printed above the alkali metals. Which interpretation of that placement is justified?

Its position reflects a shared feature rather than identical chemistryIts position predicts the same solid crystal structure as the alkali metalsIt lists an element with a fixed charge across its compoundsIt shows an element that reacts with water like an alkali metal

Question 5Two elements occupy the same vertical column. Which feature explains their recurring chemical similarities?

Equal numbers of neutrons in their nucleiThe same total number of protons in each nucleusIdentical numbers of occupied electron shellsSimilar patterns in the electrons available for bonding

Question 6Measurements on isolated gaseous atoms compare the work required to detach one electron. Which quantity is measured?

Electronegativity within a specified chemical bondAtomic mass of the atom before the electron is removedIonization energy associated with removing the specified electronNeutron number after the specified electron leaves

Question 7A student predicts a compound’s safety from the reactivity of one of its constituent elements. What distinction is missing?

A compound is a mixture that retains separate elemental propertiesChemical combination produces a substance with its own propertiesAn element changes atomic number when it enters a stable compoundA compound’s charge equals the sum of its elements’ group numbers

Question 8A main-group metal and nonmetal with a large electronegativity difference form a compound. Which bonding model fits that broad pattern?

Transfer of valence electrons to form oppositely charged ionsEqual sharing of bonding electrons between the two elementsThe compound retains the properties of its separate elementsA shared pool of mobile electrons surrounding positive metal ions

Question 9A table entry gives a non-integer relative atomic mass. How should it be read?

The exact number of protons in a single representative atomThe neutron count shared by the element’s isotopesThe total electrical charge of a neutral atom’s electronsThe average reflecting the element’s isotopic mixture

Question 10Across a period, nuclear charge rises while electrons enter the same main shell. What explains the general reduction in atomic radius?

A reduction in the number of protons along the rowStronger attraction of the outer electrons toward the nucleusThe removal of an occupied main shell at each stepA decrease in effective nuclear attraction across the row

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Periodic Table Quiz

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