EOG Atoms and Periodic Table

Which particle type can be identified as being from a specific element?

• electron

• atom

• neutron

• proton

Which is the best example of an element?

• silver beads alone

• silver beads in pairs

• silver beads joined with gold beads

Which best explains how the atomic size of the elements is arranged in the periodic table?

• The atomic size of the elements decreases from left to right and decreases from top to bottom.

• The atomic size of the elements increases from left to right and increases from top to bottom.

• The atomic size of the elements decreases from left to right and increases from top to bottom.

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A substance is found containing two types of atoms. Some atoms have 3 protons, 4 neutrons and 3 electrons, while other parts of the sample have 3 protons, 3 neutrons and 3 electrons. Which is most likely the substance?

• ion

• element

• mixture

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Which is most likely responsible for the arrangement of elements in the table?

• Scientific Law

• Law of Conservation of Mass

• Periodic Law

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How are elements arranged on the periodic table?

• by mass, from lowest to highest

• by number of protons, from lowest to highest

• by date of discovery or creation, from oldest to newest

How many protons are in a sodium atom?

• Sodium has 1 proton.

• Sodium has 3 protons.

• Sodium has 11 protons.

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Which do elements of the same vertical column on the periodic table have in common?

• number of protons

• chemical properties

• number of neutrons

Which substance is an element?

• water

• oxygen

• petroleum

• carbon dioxide

Which best represents an element?

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