Chemistry Periodic Table Quiz

Atoms of elements in a group on the Periodic Table have similar chemical properties. This similarity occurs because of the atom's

• principle energy levels

• atomic orbitals

• valence electrons

• atomic mass

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What subatomic particle do you use to identify an element?

• both proton and electron

• proton

• neutron

• electron

What is the atomic number of Lithium? (Li)

• 1

• 3

• 23

• 6

Which of these elements is the most electronegative?

• Oxygen O

• Selenium Se

• Carbon C

• Arsenic As

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Which statement best explains why most atomic masses on the Periodic Table are decimal numbers?

• Atomic masses are a weighted average of the naturally occurring isotopes.

• Atomic masses are determined relative to an H-1 standard

• Atomic Masses are determined relative to O-16 standard

• Atomic masses are an estimated average of the artificially produced isotopes.

Which of these options describe a "group" in the periodic table.

(There are multiple answers)

• Groups are HORIZONTAL rows

• Groups are VERTICAL columns

• The atomic number increases as you move from the top to the bottom in a group

• Elements in a group share the same number of valence electrons

Flourine (F) would be most similar to which of these elements?

• Oxygen - O

• Potassium - K

• Iodine - I

• Gold - Au

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Which of these statements correctly describes a trend in atomic radii in the periodic table?

• The atomic radius decreases from top to bottom in a group

• The atomic radius increases from left to right across a period

• The atomic radius remains constant from right to left across a period

• The atomic radius increases from top to bottom in a group.

How many electrons are in the outermost energy shell of a phosphorus atom ?

(P)

• 5

• 0

• 10

• 8

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