Structure and bonding-2.1~2.4

What am I?

• Potassium-19

• Potassium-39

• Potassium-20

• [K⁺¹] cation

An atom with a charge of -4 has _______.

• Lost 4 electrons
• Gained 4 electrons
• A new total of 4 electrons

Adding or subtracting neutrons (charge = 0, mass = 1) makes the element change into an...

• ion
• mixture
• isotope
• neutral atom

Is the element shown in this image an ion, isotope or normal atom?

• atom
• isotope
• cation (+ ion)
• anion (- ion)

How many VALENCE ELECTRONS does Chlorine have?

• 2

• 7

• 8

• 10

• 17

Ionic bonds are formed when electrons get

• Shared between two atoms

• Removed from both atoms

• Transferred from one atom to another

• Added to both atoms

How many valence electrons does Po (Polonium) have? (Use your PTable)

• 2

• 4

• 6

• 8

Atoms are most stable when their outer shell is complete.

• True

• False

Why do elements form chemical bonds?

• Because they're friendly

• To create a new element

• To become stable

• Because they all need to gain more electrons

If you were to draw the lewis dot structure for Germanium (Ge), how many dots would you put around it?

• 2

• 4

• 6

• 8