Show:
Ions
Valence Electrons
Ionic Bonds
Covalent Bonds
Electron Dot Diagrams
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What does an atom have to do to become a positive ion?
lose an electron
100
What determines if atoms will bond with one another?
valence electrons (electrons in outermost shell)
100
Ionic bonds form between a _____ ion and a ______ ion.
A positive ion and a negative ion
100
When does a covalent bond form?
A covalent bond forms when atoms share electrons.
100
How many dots are around Sodium (Na)?
1
200
What does an atom have to do to become a negatively charged ion?
gain an electron
200
How many valence electrons are in group 16?
6
200
Ionic bonds form between what classes of elements?
Metals and nonmetals
200
What class of elements does a covalent bond form between?
A covalent bond forms between nonmetals.
200
How many dots around Helium (He)?
2
300
What is an ion?
a charged particle (atom)
300
Based on the number of valence electrons, would elements in group 18 make bonds?
no
300
When atoms are bonded by ionic bonds, metals _______ electrons.
lose
300
Water is made when oxygen is bonded to another element with covalent bonds. What is the other element and how many atoms of that element is needed?
The other element is hydrogen, and two hydrogen atoms are needed.
300
How many dots around the Halogen Group?
7
400
Would two positive ions make bonds? Why?
No, because like charges are not attracted to each other. They repel.
400
How many valence electrons does aluminum (Al) have?
3
400
Ionic bonds form _______________. Hint: (compounds, molecules, crystals, mixture)
compounds
400
What is formed when a group of atoms is bonded together by covalent bonds? Hint: (compounds, molecules, crystals, mixture)
molecules
400
How many dots around the alkaline earth metals?
2
500
What is a cation? (High School question)
a positively charged ion
500
Why won't elements in group 18 make bonds?
because their outer shell is full
500
What are qualities of substances that are bonded by ionic bonds? Hint: Think about melting points
They are hard, brittle, and have high melting points.
500
What are the qualities of a substance that is bonded by covalent bonds? Hint: Think about melting points
The qualities are low melting and boiling point, also they tend to be brittle when in a solid state.
500
How many dots could there be in an electron dot diagram?
1, 2, 3, 4, 5, 6, 7, or 8