Study Guide for Ch 6 Test

Looking at the electron dot diagram, which statement correctly identifies the most stable elements?

• Fluorine is the most stable because it's missing one of its electrons.
• Neon is the most stable because its highest energy level is completely full.
• Neon is the most stable because it has only one electron in its outer most shell
• Carbon is the most stable because it has only one electron all the way around it. 

Tags

NGSS.HS-PS1-1

True of False:
Typically, atoms gain or lose electrons to achieve a stable electron configuration.

• True
• False

Ionization energies tend to - 

• decrease from the bottom to the top of a group.
• increase from left to right across a period.
• decrease from left to right across a period.
• increase from top to bottom of a group.

Ionic bonding involves the - 

• sharing of two pairs of electrons.
• transferring of electrons.
• transferring of protons.
• sharing of neutrons.

If there was a one-to-one ratio of potassium ions to iodide ions, its formula would like like this - 

• PI
• K1I1
• KI
• None of the options

In the compound MgCl2, the subscript 2 indicates that - 

• the chloride ion is twice the size of the magnesium ion.
• there are 2 chloride ions for each magnesium ion.
• there are 2 magnesium ions for each ion of chlorine.
• the chlorine ion is twice the size of the magnesium ion. 

Which of the following is a typical property of an ionic compound - 

• poor conductor of electric current when melted
• low melting point
• low boiling point
• tendency to shatter when struck

You see a formula in which the symbols are connected by a long dash.  You can assume the chemical bonds are - 

• metallic
• unstable
• covalent
• ionic

The water molecule (H2O) is polar because it contains 2 polar single bonds and - 

• its molecule has a linear shape
• its molecules attract water more aggressively.
• its molecule has a bent shape.
• none of the options.

Water has a higher boiling point than expected because - 

• of the strong attractions between polar water molecules. 
• water molecules are not very massive.
• there is a lot of water vapor in the air.
• All of the Above.