Atoms, chemical bonding and redox reactions revision

Determine the number of electron shells in a potassium atom.

• 1

• 2

• 3

• 4

Determine the number of outer shell electrons for a chlorine atom.

• 1

• 3

• 7

• 17

Which of these substances contains non-polar covalent bonds?

Which of these substances has mainly ionic bonds?

Which of the substances is a covalent network solid?

What is characteristic to ionic compounds?

• Low melting and boiling points

• High melting and boiling points

• Softness

• Electrical conductivity in solid state

What is characteristic to metals?

• Brittleness

• Low boiling point

• Malleability

• High electronegativity

What is characteristic to nonmetals?

• High melting point

• Chemical stability

• Low electronegativity

• High electronegativity

Which atom is smaller than a silicon atom?

• Ge

• Al

• Cl

• Na

Which atom is larger than a potassium atom?

• Na

• Rb

• Ca

• Br