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Chemical Bonds
Vocabulary
Electrons
Periodic Table
Dot Diagrams
100
Which of the following is a covalently bonded molecule? a. Cl2 b. air c. Ne d. MgO
What is Cl2 - chlorine gas
100
The area around the nucleus of an atom in which the electrons travel.
What is an electron cloud
100
What happens to electrons in the formation of a polar covalent bond?
What is they are shared unequally
100
What is the number of the group in which the elements have a stable outer energy level?
What is 18
100
How many dots are shown in the electron dot diagram for calcium, element number 20?
What is 2
200
Which term describe the units that make up substances formed by ionic bonding? a. ions b. molecules c. acids d. atoms
What are ions
200
Electron dot diagrams are used to represent _______.
What is valence electrons
200
What is the maximum number of electrons in the third energy level?
What is 18
200
Potassium belongs to the Group 1 family of elements on the periodic table. What is the name of this group?
What is alikali metals
200
Sulfur, element 16, forms a negative ion. How many dots would you have to show in the electron dot diagram for the sulfur ion?
What is six
300
Which of the following compounds is unlikely to contain ionic bonds? a. NaF b. CO c. LiCl d. MgBr
What is CO - carbon dioxide
300
A _________ contains two or more atoms bonded to form a neutral particle.
What is a molecule
300
What is the neutral particle that is formed when atoms share electrons?
What is a molecule
300
In the compound H2O, the electrons in the bonds are unequally shared between oxygen and hydrogen forming ________.
What is a polar bond
300
Copper is a transition metal therefore it can have multiple ions. The Dot structure of Copper (II) is what?
What is 2 dots
400
What type of bond connects the atoms in a molecule of nitrogen gas (N2)?
What is covalent
400
A ___________ occurs when two or more atoms share electrons.
What is a covalent bond.
400
The different areas for an electron in an atom are called ___________.
What is an energy level
400
How many valence electrons does Phosphorus have?
What is 5
400
What is the purpose of a dot diagram?
It shows the elements symbol and how many valence electrons the element has.
500
Explain metallic bonding. Because of the way they bond, what two characteristics does this give most metals.
What is they are good conductors of electricity and they are not broken easily.
500
A _________ is the force that holds two atoms together.
What is a chemical bond
500
A helium atom has only two electrons. Why does helium behave as a noble gas?
Because it has two electrons in its outer shell. It only has one outer shell so it is considered full with two. Full shells are the most stable.
500
What do the element's row and column tell you about the element?
The row tells you how many energy shells an atom of the element has and the column tells you how many valence electrons the atom has?
500
Why are only the valence electrons shown in a dot diagram?
They show how the element can react with other elements.