Chemistry Review

Alkali Metals (Group 1 Elements) all form an ion with a charge of

• +1

• +2

• +3

• -1

Electronegativity is defined by:

• what ion charge the atom forms

• the ability of an atom to attract electrons to itself in a bond

• the energy required to remove an electron from an atom

• the distance between the centre of the nucleus and the furthest electron

Ionic bonds have a net ionic charge of

• +1

• -1

• +2

• 0

Which of the following atoms will bond ionically with Na

• F

• S

• K

• O

The atom Carbon has how many valence electrons?

• 6

• 12

• 8

• 4

Atomic Mass Units (amu), also known as molar mass, is a sum of

• protons

• protons and neutrons

• electrons and neutrons

• protons, neutrons, and electrons

Which chemical needs a 2 in front of it in the following reaction: Mg + HCl --> MgCl2 + H2

• Mg

• HCl

• MgCl2

• H2

A reaction has a change in enthalpy value of 253 kJ/mol. This is an example of

• an endothermic reaction

• an exothermic reaction

Which of the following atoms will bond ionically with Na

• F

• S

• K

• O

Electron pairs that do not take part in a covalent bond are referred to as

• free electrons

• floating electrons

• electron pairs

• lone pair electrons