Chemistry Vocabulary [A to Z] Part - 3 (101 to 150)

 Chemistry

Vocabulary [A to Z]

Part - 3 (101 to 150)

101. Group

atoms bound together as a unit forming part of a molecule

102. Halogen

any of five related nonmetallic elements (fluorine or chlorine or bromine or iodine or astatine) that are all monovalent and readily form negative ions

103. Heat

a form of energy transferred by a difference in temperature

104. Heterogeneous

consisting of elements not of the same kind or nature

105. Homogeneous

all of the same or similar kind or nature

106. Hydrate

any compound that contains water of crystallization

107. Hydrocarbon

an organic compound containing only carbon and hydrogen

108. Hydrogen Bond

a chemical bond consisting of a hydrogen atom between two electronegative atoms (e.g., oxygen or nitrogen) with one side be a covalent bond and the other being an ionic bond

109. Hypertonic

having a higher osmotic pressure than a comparison solution

110. Hypotonic

having a lower osmotic pressure than a comparison solution

111. Ideal Gas

a hypothetical gas with molecules of negligible size that exert no intermolecular forces

112. Immiscible

(chemistry, physics) incapable of mixing

113. Indicator

a substance that changes color to show something's presence

114. Inorganic Compound

any compound that does not contain carbon

115. Ion

a particle that is electrically charged positive or negative

116. Ionic

containing or involving electrically charged particles

117. Ionic Bond

a chemical bond between oppositely charged ions

118. Isomer

a compound that exists in forms having different arrangements of atoms but the same molecular weight

119. Isotonic

having the same or equal osmotic pressure

120. Isotope

atom with same atomic number, different number of neutrons

121. Kelvin

British physicist who invented the Kelvin scale of temperature and pioneered undersea telegraphy (1824-1907)

122. Kinetic Theory

(physics) a theory that gases consist of small particles in random motion

123. Lattice

an arrangement of points in a regular periodic pattern

124. Law Of Conservation Of Matter

a fundamental principle of classical physics that matter cannot be created or destroyed in an isolated system

125. Law Of Definite Proportions

(chemistry) law stating that every pure substance always contains the same elements combined in the same proportions by weight

126. Le Chatelier'S Principle

the principle that if any change is imposed on a system that is in equilibrium then the system tends to adjust to a new equilibrium counteracting the change

127. Liquid

fluid matter having no fixed shape but a fixed volume

128. Litmus Test

material that changes color in acidic or alkaline solutions

129. Luster

the property of something that shines with reflected light

130. Malleable

capable of being shaped or bent

131. Mass

the property of a body that causes it to have weight

132. Mass Number

the sum of the number of neutrons and protons in an atomic nucleus

133. Matter

that which has mass and occupies space

134. Melting Point

the temperature at which a solid turns into a liquid

135. Meniscus

the curved upper surface of a liquid in a vertical tube

136. Metal

a chemical element or alloy that is usually a shiny solid

137. Metallic Bond

a chemical bond in which electrons are shared over many nuclei and electronic conduction occurs

138. Metalloid

of or being a nonmetallic element that has some of the properties of metal

139. Miscible

capable of being mixed, in chemistry

140. Mixture

a substance consisting of substances blended together

141. Molarity

concentration measured by molecular weight of a substance

142. Mole

the molecular mass of a substance expressed in grams

143. Molecule

the simplest structural unit of an element or compound

144. Monatomic

of or relating to an element consisting of a single atom

145. Neutral

having only a limited ability to react chemically

146. Neutralization Reaction

a chemical reaction in which an acid and a base interact with the formation of a salt; with strong acids and bases the essential reaction is the combination of hydrogen ions with hydroxyl ions to form water

147. Neutron

a subatomic particle with zero charge

148. Noble Gas

any of the chemically inert gaseous elements of the helium group in the periodic table

149. Nonpolar

not ionic

150. Nucleus

the positively charged dense center of an atom