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PTOE Quiz with 100% correct answers graded A+
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PTOE Quiz with 100% correct answers graded A+
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PTOE QuizMendeleev arranged the elements by their - correct answer ✔✔atomic mass
The horizontal rows on the PTOE are called - correct answer ✔✔periods
The vertical columns on the periodic table are called - correct answer ✔✔a group or family
In each square of the PTOE, the number at the bottom is the: - correct answer ✔✔average atomic mass
The number at the top of each square on the PTOE is the - correct answer ✔✔atomic number (# of
protons)
What is the chemical symbol for Lead? - correct answer ✔✔Pb
On the PTOE, elements on the right side of the "stair-step" line are classified as: - correct answer
✔✔Nonmetals
These elements located on the "stair-step" line are sometimes called "semiconductors." - correct answer
✔✔Metalloids
Most of the elements on the PTOE are classified as - correct answer ✔✔Metals
In the modern PTOE elements are arranged by: - correct answer ✔✔Atomic Number
How many Valanlce electrons does Iodine have? - correct answer ✔✔7
Beryllium is in group: - correct answer ✔✔2
, An element's identity is determined by the number of: - correct answer ✔✔Protons (mass #)
Which elements have the most similar chemical properties? - correct answer ✔✔K (Potassium) and Na
(Sodium)
How many electrons do atoms need to be stable? - correct answer ✔✔8
The atomic mass of an element is: - correct answer ✔✔The number of protons and neutrons an element
has in its nucleus
The atomic number is the - correct answer ✔✔Number of protons an element has
Elements in the same group (or family) have the same number of - correct answer ✔✔Valence shells
What charge does an electron have? - correct answer ✔✔Negative charge
Elements in the same period have the same number of - correct answer ✔✔Energy levels
Periodic law states that repeating patters of chemical properties form when you arrange elements by
their: - correct answer ✔✔Average atomic mass
A horizontal row in the PTOE is called a: - correct answer ✔✔Period
A vertical column in the PTOE is called a: - correct answer ✔✔Group or family
How many protons does oxygen have? - correct answer ✔✔8
How many electrons does oxygen have when it is neutral? - correct answer ✔✔8
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