Ionic and Covalent Bonds
Differences between ionic and covalent bonds
Writing names and formulas for ionic and covalent bonds
Lewis dot structure (must draw)
Metallic bonds and writing names for ionic and covalent bonds
100
Cation is a positively charged ion and anion is a negatively charged ion
What are cations and anions?
100
Ionic bonds: Called compound/salt, has a high melting point, conduct electricity in water, usually soluble (can dissolve) Covalent bonds: Called compound/molecule, low melting point, cannot/poor conductors of electricity, usually insoluble (does not dissolve)
What is the difference between ionic and covalent bonds in their characteristics?
100
1. Write the symbols for the cation and the anion 2. Determine the charge on the cation and anion. 3. Determine formula. Write the two symbols together and determine how to make the compound neutral by finding the lowest common multiple of the charges on each ion. Then figure out how atoms of each element are needed to make that charge.
What is the way in which you write the names and formulas for ionic compounds?
100
It is a way of representing atoms or molecules by showing electrons as dots surrounding the element symbol and only for covalent bonds. One bond is represented as two electrons.
What is the definition of a Lewis Dot Structure?
100
It is a sharing of electrons between many atoms of a metal element.
What is happening in a metallic bond?
200
Ionic bond
What is the complete transfer of valence electron(s) between atoms and it is a type of chemical bond that generates two oppositely charged ions.
200
In an ionic bond, the atoms are bound together by the attraction between oppositely-charged ions and in a covalent bond, the atoms are bound by pairs of electrons shared by two atoms.
What is the difference between ionic and covalent bonds in how they form?
200
1. Look at the first word of the compound’s name. Identify the element name and write the symbol for it 2. If the first name of the compound has a prefix, write the number the prefix refers to as the symbol’s subscript (little number) 3. Look at the second word in the compound’s name and identify the element. Write the symbol for this element 4. Determine the number that the prefix of the second name refers to and write this number after the second symbol as a subscript (examples of prefixes are di, try, tetra, etc)
What is the way in which you write the names and formulas of covalent compounds?
200
1. Add up all the valance electrons of the atoms involved 2. You need to pick the central atom. This is usually easy, this atom will be surrounded by the others. Never H. 3. Now we create our skeleton structure by placing bonds in. A bond is a dash that represents 2 electrons. 4. Starting with the outer atoms add the remaining electrons in pairs until all the electrons have run out.
What is the way in which you draw Lewis dot structures?
200
Copper and silver
What is an example of a metallic bond?
300
Covalent bond
What is a chemical bond that involves the sharing of electron pairs between two atoms of the same element or of elements close to each other in the periodic table
300
An ionic bond is metal + non-metal and a covalent bond is non-metal + non-metal
What is the difference between ionic and covalent bonds in identifying which elements will participate in each?
300
Ammonium fluoride
What is the way in which you write the compound NH4F (look at your transition metal ions and polyatomic ion chart) and what kind of compound is it?
300
No lone pairs
What is the Lewis dot structure of CH4 and how many lone pairs does it have?
400
Covalent bond
What is the type of bond for HCl
400
Ionic bond because the sodium ions have a positive charge and the chlorine ions have a negative charge and the opposite charges attract
What is the bond for NaCl?
400
Silicon tetrafluoride
What is the way in which you write the compound SiF4 and what kind of compound is it?
400
Four lone pairs
What is the Lewis Dot Structure for CO2 and how many lone pairs does it have?
400
Scandium hydroxide
What is the way in which you write Sc(OH)3 and what kind of compound is it?
500
Ionic bond
What is the type of bond for NaCl?
500
Covalent bond because the valence electrons are common to both atoms and they are both non-metals?
What is the bond for H20?
500
TiSe
What is the way in which you write the formula for titanium (II) selenide and what kind of compound is it?
500
Eight lone pairs
What is the Lewis dot structure of H2O2 and how many lone pairs does it have?
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