General Chemistry- The Periodic Table Flashcards Preview

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Flashcards in General Chemistry- The Periodic Table Deck (189)
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121

What is the most common scale to meausre electronegativity?

Pauling electronegativity scale

122

Electronegativity is what?

A relative measure

123

What is the range of the scale used to find electronegativity?

0.7 to 4.0

124

Which are the least and most electronegative elements?

Least: Cesium
Most: Flourine

125

How does electronegativity change on a periodic table?

Increase across a period from left to right
Decreases from top to bottom

126

What are the three increaseing factors on a periodic table from left to right?

Electronegativity
Ionization energy
Electron affinity

127

What is the decreaseing factor on the periodic table from left to right?

Atomic radius

128

What are the increasing factors on a periodic table from bottom to top?

Electronegativity
Ionization energy
Electron affinity

129

What is the decreasing factor on the periodic table from bottom to top?

Atomic radius

130

Which metals are the classic physical properties of metals?

Alkali metals

131

What is the exception to the classic physical properities of metals seen in Alkali metals?

Density is lower than most metals

132

How many loosely bound electrons do the Alkali metas have in there outer most shell?

One

133

What trends are seen in Alkali metals?

(Zeff) values are very low
Largest atomic radii of all elements in their respective periods
Low ionization energies
Low electron affinities
Low electronegativities

134

Alkali metals lose one electron to form what?

Univalent cations

135

Alkali metals react with _________, especially _________.

Nonmetals especially Halogens

136

Alkaline earth metals possess what?

Many properties charateristic of metals

137

What makes Alkaline metals different from Alkali?

Slightly higher effective nuclear charges and thus slightly smaller atomic radii

138

How many valence electrons does Alkaline metals have in the outer most shell?

Two

139

What is formed when both electrons are removed from Alkaline metals?

Divalent Cations

140

Which two metal types make up Active metals? Why?

Alkali and Alkaline Earth Metals
They are so reactive that they are not naturally found in their elemental (neutal) state.

141

What are chalcogens?

Group VIA or Group 16
An eclectic group of nonmentals and metalloids

142

What are chalcogens crucial for?

Normal biological functions

143

Chalcogens are not as ______________________ as halogens.

Reactive

144

What are characteristics of Chalcogens?

Six electrons in their valence shell
Small atomic radii
Large ionic radii

145

Why is oxygen the most important?

It is one of the primary consituents of water, carbohydrates, and other biological molecules.

146

Why is sulfur important?

Component in amino acids, and vitamins

147

Why is selenium important?

It is a Nutrient for microorganisms

148

What is important to know about the rest of the Chalcogens?

They are primarily metallic and generally toxic

149

In high concentrations, chalcogens are what?

Toxic or damaging

150

What are halogens?

Group VIIA or 17
Highly reactive nonmetals with seven valeence electrons