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Flashcards in Module 2 Deck (15)
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1

What is an Isotope?

Atom of the same element with a different number of neutrons

2

Define relative atomic mass

Relative atomic mass is the mass of an atom of an element relative to one twelfth of the mass of an atom of Carbon-12

3

Define relative isotopic mass

Relative atomic mass is the mass of an isotope of an element relative to one twelfth of the mass of an atom of Carbon-12

4

What is the ideal gas equation (and what are the units)?

pV=nRT where T is in kelvin and p is in pascals

5

What is the difference between strong and weak acids?

Strong acids fully dissociate their H+ ions

6

What is special about the 4s sub-shell?

It fills and empties before 3d

7

Define ionic bonding

The electrostatic attraction between positive and negative ions

8

What are the properties of Ionic compounds?

Mostly solids at room temperature, with high melting points. Dissolve in polar solvents and conduct electricity while dissolved or molten, they act as mobile charge carriers

9

What is covalent bonding?

Strong electrostatic attraction between a shared pair of electrons, the nuclei of the bonded atoms

10

What is a coordinate bond?

A covalent bond whose shared pair of electrons was only supplied by one of the bonded atoms, originally a lone pair

11

What is the bond angle in a tetrahedral compound?

109.5 degrees

12

What I the bond angle in a pyramidal compound?

107.0 degrees

13

What is the bond angle in a non-linear compound?

104.5 degrees

14

How do London Forces arise?

At any moment, movement of electrons result in an instantaneous dipole, which in turn, induces a dipole on neighbouring atoms

15

What is hydrogen bonding?

Interaction between a bonded hydrogen atom and a very electronegative element, such as oxygen, nitrogen or fluorine