Chemical Bonding Flashcards
Explain what elements and how many of each type are in the compound Na2S.
There will be 2 atoms of Sodium in the compound because of the 2 that signifies two atoms of Na are in the compound. There will be 1 atom of Sulfur.
What determines whether or not a compound will contain an ionic bond versus a covalent bond?
A covalent bond is a bond between two or more non metals and the electrons are shared while an ionic bond is between a metal and non metal where the electrons are given from the metal to the non metal.
Why don’t covalent molecules conduct electricity?
Because they do not include metal, only non metals. Non metal’s atoms share electrons so they do not posses a charge.
What physically happens to an atom when it becomes an ion?
It becomes negatively charged or positively charged.
What are the steps to naming an ionic compound?
- Write the normal name of the first element (a metal)
2. Write the second element’s name (a non metal) with the ending “ide,” at the end.
If an atom gains 2 electrons what charge does the ion have?
(2-) Negative
How many pairs of electrons does a triple bond contain?
3
What are the characteristics of Ionic bonds?
- Give and receive electrons
- They are held together by the positive and negative electron being attracted to each other
- The types of elements that are involved are metals and non metals
- At room temperature they are solid (hard, brittle, crystals)
- Their melting point is high
- Are good conductors of electricity
- Cannot bond to themselves
- Contain charged particles
What are the characteristics of a covalent bond?
- Electrons are shared
- Are held together by the positive nucleus being attracted to the negative electrons
- The type of elements involved are two or more metals
- At room temperature they are gas
- The melting point is low
- They are poor conductors
- Can create diatomic molecules
- Do not contain charged particles
What is an Ionic Bond?
The attraction between 2 oppositely charged ion, it is between a non metal and a metal
What is a covalent bond?
A bond between two or more non-metals where the unpaired electrons are shared.
What is a chemical formula?
A combination of symbols and numbers that give the ratio of atoms in a compound.
What is an ion?
An atom that has gained a charge by losing or gaining electrons.
What is a polyatomic ion?
Two or more different atoms bonded together
What is a diatomic molecule?
Two atoms of the same element covalently bonded together.
