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Flashcards in Ch5 Deck (33)
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0
Q

played the lead role in developing the structure of the

modern periodic table; predicted the existence of several missing elements at the time of his work

A

Dimitri Mendeleev

1
Q

formulated the concept of triad

A

Johann Döbereiner

2
Q

devised the commonly used electronegativity scale

A

Linus Pauling

3
Q

ordered the periodic table by atomic number

A

Henry Mosley

4
Q

proposed that elemental properties varied in octaves

A

John Newland

5
Q

exists when some measurable property repeats on a regular basis in a sequential list or time sequence.

A

Periodicity

6
Q

Who created the periodic law

A

Dimitri Mendeleev

7
Q

stated that the properties of elements vary with their atomic masses in a periodic way.

A

Periodic Law

8
Q

Who revised the periodic law

A

Henry Mosley

9
Q

What does the revised law state

A

the properties of elements vary with their atomic numbers in a periodic way.

10
Q

vertical column of elements

A

Group or Family

11
Q

Horizontal rows of ele­ments

A

Period or series

12
Q

solid, lustrous (shiny), malleable, and ductile, and they are good conductors of heat and electricity.

A

Metals

13
Q

generally gases or soft, crumbly solids. Examples are oxygen, nitrogen, carbon, and sulfur

A

Nonmetals

14
Q

They share properties of both metals and nonmetals. Examples are boron silicone and arsenic

A

metalloids

15
Q

distance from the center of an atom’s nucleus to its outermost electron.

A

atomic radius

16
Q

minimum energy required to remove the first electron from its out­ ermost shell to make it a cation

A

First Ionization Energy

17
Q

What family or element group has the best chance of having a largest ionization energies because they have a full outer energy level and do not gain or give up electrons easily

A

Noble Gases

18
Q

amount of energy required to add an electron to a neutral atom to form a negative ion, or anion

A

Electron Affinity

19
Q

Electron affinity measures what?

A

How strongly an atom attracts additional electrons

20
Q

measure of the attrac­ tion between the nucleus and valence electrons

A

Electronegativity

21
Q

Who won the noble peace prize?

A

Linus Pauling

22
Q

study of elements and the compounds they form

A

Descriptive chemistry

23
Q

What 2 elements make hard water

A

Magnesium and Calcium

24
Q

family were first isolated in 1807 by

A

Sir Humphrey Davy.

25
Q

elements are metals that are very chemically reactive. Examples are lithium, sodium, potassium and cesium

A

alkali metals

26
Q

alkaline-earth metals.

A

metals are all solid at room temperature and have typical metallic properties. Examples are calcium magnesium and radium

27
Q

Silver gold copper and iron.

A

transition metals.

28
Q

What are native mineral

A

Elements that are found as pure solids in nature. Example is gold, silver, copper, and carbon

29
Q

Aluminum tin and lead are in this group

A

Post-transition metals,

30
Q

first recognized nitrogen as an element.

A

Daniel Rutherford

31
Q

family is probably the most chemically uniform group of elements other than the noble gases; called this because they form salts when they react with reactive met­als. Examples are fluorine, chlorine, bromine, iodine

A

halogen

32
Q

Xenon krypton and radon. they do not react with other elements except under unusual conditions of pressure and temperature.

A

noble gases