Electrons and Charges
What are the most valence electrons an atom can have?
8
What holds an ionic bond together?
oppositely charges ions (positive and negative)
Ionic compounds are electrically...... (positive, negative, or neutral)
neutral
What is the chemical name for K2S?
Potassium Sulfide
What do you call an atom with the same number of protons but a different number of neutrons?
isotope
How many valence electrons are in Group 16? And what is its oxidation number?
6 ve- and oxidation number is 2-
A chemical bond that forms when atoms share electrons is what?
Covalent Bond
Describe what ionic compounds look like (what do they form).
3D, brittle, crystal structures
What is the formula for dinitrogen monoxide?
N2O
What is an ion that has more than one atom bonded together?
Polyatomic ion
When an atom loses an electron, what charge will it have?
Positive
What is an ion?
An atom that has gained or lost electrons (and is now charged)
Which elements will form an ionic compound:
K and Al
Mg and B
H and N
Be and F
Be and F
What is the chemical name of the compound CO?
Carbon Monoxide
What does the superscript in a chemical equation tell you?
Oxidation number
What is the oxidation number of an element in Group/Family 17?
1-
Which of the following are formed by Ionic Bonds: Cs3N CO2 C2H4 K2S?
Cs3N and K2S
Which group or family does not bond with others, and why?
Noble gases, because their outer electron ring is full.
What is the correct chemical formula to bond Lithium and Phosphorus?
Li3P
What is a metalloid? Name one in the 2nd period.
An element that has some properties of both metals and nonmetals. Boron
Do metals usually have positive or negative oxidation numbers? Are they first or second in a chemical formula?
positive and first
What is a triple bond? And name an element that will form one when it bonds with itself.
three pairs of electrons shared by 2 atoms. Ex: N, P, As
Which types of compounds have a low melting point?
Covalent
What is the correct chemical formula for Calcium Nitride?
Ca3N2
What is it called when atoms share electrons unevenly?
Polar Bond