Riddles
What word gets shorter when you add 2 letters to it?
the word short
What determines how an atom bonds with other atoms?
Valence electrons
What types of elements make covalent bonds?
non-metals +non-metals only
When an atom loses or gains electron(s), it forms an:
Ion
Which bonds occurs between two nonmetals?
Covalent
What month of the year has 28 days?
All of them
What does the word octet mean?
How many covalent bonds are found in C2H6
8 single covalent bonds
In ionic bonds, electrons are ___________
Transferred/Stolen
The 'electron greedy' atom in water.
Oxygen
What has a head but no brain?
A head of lettuce
Noble gases are said to be :
Inert
Covalent bonds form compounds that usually have _____ melting and boiling points.
Low
Can you make an ionic compound using only negative ions?
No, Ionic bonds are bonds between positively charged cations and negatively charged ions
How many atoms are in C17H21NO4?
43
David's father has three sons: Snap, Crackle and _____?
David
Which element's name is written first in an ionic compound?
The metal
At room temperature, what forms do covalent compounds assume?
Solids, liquids, or gases.
Name an ionic compound that is not NaCl.
MgCl2, KCl, LiCl, MgO...
This noble gas has a name similar to a fictional radioactive substance that is the only thing capable of hurting or weakening the otherwise invulnerable superhero Superman.
Krypton
A rooster sits on the roof of a barn and lays an egg. Which side of the barn does it roll down?
Roosters dont lay eggs
What elements satisfy the octet rule by only having 2 valence electrons in their first energy level?
What does the chemical symbol in the electron-dot diagram represent?
Nucleus and all the filled inner energy levels of the atom.
When do ionic compounds conduct electricity?`
When they are dissolved in water.
Explain why CaCl₂ has two chlorine atoms for every calcium atom.
Calcium has a +2 charge and each chlorine has –1, so two chlorines are needed to balance the +2 charge.