Grade 9 - Ionic Bonding

What do we call the electrons that participate in a bond formation?

• internal electrons

• bonding electrons

• electron configuration

• valence electrons

What is the electron configuration of the element Magnesium (Mg) with the atomic number of 12?

• 1s­² 2s² 2p⁶ 3s¹

• 1s­² 2s² 2p⁵ 3s²

• 1s­² 2s⁴ 2p⁶ 3s²

• 1s­² 2s² 2p⁶ 3s²

What is the ability of an atom to attract electrons toward itself to form a negative ion?

• ionization energy

• electronegativity

• electron affinity

• none of the above

When does a negative ion (anion) formed?

• when an element lose an electron

• when an element lose a proton

• when an element gain an electron

• when an element share electron

Why do elements form bonds?

• to obtain a stable configuration

• to gain electrons

• to share electrons

• to lose electrons

The dots in an “electron-dot structure” represent _____.

• the electrons of an element

• the nucleus of an element

• protons of an element

• the valence electrons of an element

The chemical symbol in an “electron-dot structure” represents _____.

• the electrons of an element

• the nucleus and outer electrons

• the nucleus and inner electrons

• the protons and inner electrons

Which of the following subatomic particles carries a negative charge?

• electron

• proton

• neutron

• all of the above

What is the amount of energy required to remove an electron form an atom?

• ionization energy

• electronegativity

• electron affinity

• none of the above

When an element gains an electron, it forms a/n ______.

• cation

• anion

• positive ion

• none of the above