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Intro to Physics and Chemistry > Chapter 5 > Flashcards

Chapter 5 Flashcards

1
Q

How many electrons shells does sodium (Na-ll) posses?

A

3

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2
Q

In attempting to group elements, Mendeleev used their…

A

physical and chemical properties

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3
Q

Mendeleev’s periodic table arranged all the known elements in order of…

A

increasing atomic mass

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4
Q

When Mendeleev arranged the elements in rows of seven…

A

all elements in a column had the same valence

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5
Q

The elements of the modern periodic table are arranged in order of increasing…

A

atomic number

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6
Q

The modern periodic law states that the physical and chemical properties of elements are periodic functions of their…

A

atomic number

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7
Q

Elements in the same family of the periodic table…

A

have similar properties

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8
Q

The most abundant element in the atmosphere is…

A

nitrogen

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9
Q

Elements on the left side of the periodic table tend to be…

A

active solids

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10
Q

Elements on the far, right side of the periodic table tend to be…

A

inactive gases

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11
Q

The most abundant element in the earth’s crust is…

A

oxygen

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12
Q

Most of the elements on the periodic table are…

A

metals

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13
Q

Which of the following is a metalloid?

A

silicon (14)

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14
Q

Moving left to right across a period, the number of valence electrons of the atoms…

A

increases steadily

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15
Q

In chemical combinations, nonmetals tend to…

A

gain electrons

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16
Q

Which of the following occurs in a regular, repeating pattern in Mendeleev’s table?

A

chemical properties

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17
Q

Which chemical group includes elements that are found in nature as solids, liquids, and gases?

A

halogens

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18
Q

The noble gases are inactive because…

A

their outermostenergy levels are complete

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19
Q

Which is true for all the members of the halogen family?

A

they have 7 valence electrons

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20
Q

The category that includes potassium(K-19)…

A

alkali metals

21
Q

The category that includes calcium(Ca-20)…

A

alkaline earth metals

22
Q

The category that includes iron(Fe-26)…

A

transition metals

23
Q

How many valence electrons does boron (B-5) posses?

A

3

24
Q

T/F: The properties of the elements in a period are very similar…

A

false

25
Q

T/F: Metalloids are better conductors of heat and electricity than are metals

A

false

26
Q

T/F: The alkali metals are more active than the alkaline earth metals

A

true

27
Q

T/F: No two elements have the same atomic number

A

true

28
Q

T/F: Most of the elements of the periodic table exist naturally as solids

A

true

29
Q

The standard on which the atomic mass unit is bases is the mass of a…

A

carbon-12 atom

30
Q

At room temperature, none of the metals are…

A

gases

31
Q

In the modern periodic table, elements are arranged by increasing…

A

atomic number

32
Q

Properties of elements in a predictable way when atomic numbers are used to arrange elements into…

A

groups

33
Q

Pattern of repeating pattern is…

A

periodic law

34
Q

Each column on periodic table is a…

A

group

35
Q

Each row on the periodic table is a…

A

period

36
Q

_________________ is a value that depends on the distribution of an element’s isotopes in nature and the masses of those isotopes

A

atomic mass

37
Q

______is defined as one twelfth the mass of a carbon-12 atom

A

atomic mass number

38
Q

___________ are classified as metals, nonmetals, and metalloids

A

elements

39
Q

_______are elements that form a bridge between the elements on the left and right sides of the table

A

transition metals

40
Q

________are metals with properties that fall between metals and nonmetals

A

metalloids

41
Q

Group 2A is called….

A

alkaline earth metals

42
Q

Group 3A is called….

A

the boron family

43
Q

Group 4A is called….

A

the carbon family

44
Q

Group 5A is called….

A

the nitrogen family

45
Q

Group 7A is called….

A

halogens

46
Q

Group 8A is called….

A

noble gases

47
Q

_____is an electron that is the highest occupied energy level of an atom.

A

valence electron

48
Q

Elements in a group have similar properties because they have the same number of __________

A

valence electrons

49
Q

Group 1A are called….

A

alkali metal

Intro to Physics and Chemistry (1 decks)

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