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Science Miss Sonn > Perdioc Table > Flashcards

Perdioc Table Flashcards

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1
Q

What is the primary purpose of the periodic table?

A

To organize and classify chemical elements based on their properties.

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2
Q

True or False: The periodic table is arranged in order of increasing atomic number.

A

True

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3
Q

What do the columns in the periodic table represent?

A

Groups or families of elements with similar chemical properties.

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4
Q

Fill in the blank: The horizontal rows in the periodic table are called __________.

A

Periods

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5
Q

Which element has the atomic number 1?

A

Hydrogen

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6
Q

What are the three main categories of elements in the periodic table?

A

Metals, nonmetals, and metalloids.

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7
Q

What is the significance of the atomic mass listed on the periodic table?

A

It represents the average mass of an element’s isotopes.

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8
Q

True or False: Noble gases are found in group 18 of the periodic table.

A

True

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9
Q

Which element is represented by the symbol ‘Fe’?

A

Iron

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10
Q

What is the name of the group that contains lithium, sodium, and potassium?

A

Alkali metals

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11
Q

Fill in the blank: Elements in the same group typically have the same number of __________.

A

Valence electrons

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12
Q

What is the main characteristic of transition metals?

A

They can form variable oxidation states and colored compounds.

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13
Q

Which element is a liquid at room temperature?

A

Mercury

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14
Q

True or False: The lanthanides and actinides are part of the main body of the periodic table.

A

False

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15
Q

What is the term for elements that have similar chemical behavior and are in the same column?

A

Group

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16
Q

Which element is known as the ‘building block of life’?

A

Carbon

17
Q

What is the atomic number of oxygen?

A

8

18
Q

Fill in the blank: The periodic table was first organized by __________.

A

Dmitri Mendeleev

19
Q

What distinguishes metalloids from metals and nonmetals?

A

They have properties of both metals and nonmetals.

20
Q

True or False: All elements in the periodic table are stable.

A

False

21
Q

What is the name given to the vertical columns in the periodic table?

A

Groups

22
Q

Which group contains elements that are highly reactive and are known as halogens?

A

Group 17

23
Q

What is the electron configuration of a neutral atom of sodium (Na)?

A

1s² 2s² 2p⁶ 3s¹

24
Q

Fill in the blank: The periodic table is divided into __________ and __________ sections.

A

Main group elements, transition metals

25
Q

What are the properties of alkali metals?

A

They are soft, highly reactive, and have one valence electron.

26
Q

True or False: The atomic radius generally decreases across a period.

A

True

27
Q

Which element is the most electronegative?

A

Fluorine

28
Q

What is the primary characteristic of noble gases?

A

They are inert and do not readily form compounds.

29
Q

What does the term ‘ionization energy’ refer to?

A

The energy required to remove an electron from an atom.

30
Q

Fill in the blank: The element with atomic number 26 is __________.

A

Iron

31
Q

What is the name of the two rows of elements placed below the main body of the periodic table?

A

Lanthanides and actinides

32
Q

True or False: All metals are solid at room temperature.

A

False

33
Q

Which group contains the least reactive elements?

A

Noble gases

34
Q

What is the main difference between isotopes of an element?

A

They have different numbers of neutrons.

35
Q

What is the relationship between atomic number and the number of protons in an atom?

A

They are the same; the atomic number is equal to the number of protons.

36
Q

Fill in the blank: The periodic table is a tool used in __________ to predict the behavior of elements.

A

Chemistry

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