Unit 10 chem
Predict the chemical formula for the ionic compound formed by NH₄⁺ and PO₄³⁻
(NH₄)₃PO₄
when do you use -per (ex: ClO4 - = perchlorate)
(largest number of oxygens)
When a nonmetal forms two oxyanions, what suffix(s) do you use
-ate -ate is the suffix used for the ion with the larger number of oxygen atoms -ite -ite is the suffix used for the ion with the smaller number of oxygen atoms
a subscript of 3 would use a -ite or -ate (Ex: NO3 -)
-ate nitrate
Which of the following elements have a tendency to gain electrons?
.Cl, O, F
How many sulfur ions (sulfide) are in the formula for the ionic compound formed between magnesium and sulfur (known as magnesium sulfide)? (Mg2+ and S2-)
1 MgS
What is a compound
2 or more elements chemically combined
What is a polyatomic ion?
A charged group of covalently bonded atoms
Which of the following element pairs would be most likely to form a molecular (covalent) compound? A) hydrogen; nitrogen B) calcium; selenium C) radium; phosphorus D) vanadium; iodide
A) hydrogen; nitrogen Hydrogen combines with nonmetals to form molecular (covalent) compounds. Hydrogen and nitrogen are present in ammonia, NH₃, a molecular compound.
What is the formula for an ionic compound containing Ag⁺ and S²⁻ ions?
Ag₂S
Predict the chemical formula for the ionic compound formed by Al³⁺ and C₂H₃O₂⁻
Al(C₂H₃O₂)₃
Which of the following would be classified as a monatomic element?
Au
Which of the following options should be classified as a molecular element? I. NO₂ II. Ne III. I₂
C) III only
Which of the following represents a species with 16 protons and 18 electrons? A) Ar B) S C) S²⁻ D) Si⁴⁻ E) S²⁺
C) S²⁻
Predict the chemical formula for the ionic compound formed by Ca²⁺ and ClO₃⁻
Ca(ClO₃)₂
Predict the chemical formula for the ionic compound formed by the elements Ca and S
CaS
Which of the following compounds exhibits both ionic and covalent (molecular) bonding?
CaSO₃ This compound contains a metal and a polyatomic ion consisting of nonmetals. The polyatomic ion is held together by covalent bonding while the ions are held together by ionic bonding. Ionic bonds occur between a metal and a nonmetal. Covalent bonds occur between two nonmetals.The bonds that occur between sulfur and oxygen atoms in the sulfite polyatomic ion are covalent. The bond between calcium and the sulfite polyatomic ion is ionic.
is H2O formed by a ionic or covalent bond
Covalent bond
Which element from Group IIIA (Group 13) of the periodic table does not form ionic bonds. A) Indium B) Aluminum C) Gallium D) Boron
D) Boron Boron is considered to be a nonmetal from Group IIIA
Which element is classified as a halogen? A) lithium (Li) B) calcium (Ca) C) cobalt (Co) D) fluorine (F)
D) fluorine (F)
What happens to electrons in a chemical bond
Electrons are shared or transferred between atoms
Which of the following species has the same number of protons as Fe³⁺?
Fe²⁺
What group (G) and period (P) does the element molybdenum (Mo) belong to?
G =6 P = 5
Columns on the periodic table are known as
Groups
If you dont want to use bi- you can also use ________ to add to a polyatomic anion
Hydrogen
Classify the following compound as covalent (molecular) or ionic: Al₂O₃
Ionic
Classify the following compounds as ionic or covalent (molecular): BaO, Fe₂O₃, ZnO.
Ionic, Ionic, Ionic.
Which of the following compounds contains a metal?
LiCl
Which of the following is most likely to form a +2 ion?
Mg
Predict the chemical formula for the ionic compound formed by the ions Mg²⁺ and OH⁻
Mg(OH)₂
Which of the following is the correct formula for the ionic compound formed between magnesium and nitrogen (known as magnesium nitride)? (Mg 2+ and N3-)
Mg3N2
Predict the chemical formula for the ionic compound formed by the elements Mg and Br.
MgBr₂
Which of the following is an ionic compound? A) NO₂ B) N₂O₄ C) NH₃ D) NH₄I
NH₄I
When do you use bi-
Only one H in a compound
Which of the following elements would be chemically similar to calcium (Ca)? and why?
Sr Elements that are in the same column on the periodic table are chemically similar.
Predict the chemical formula for the ionic compound formed by the elements Ti⁴⁺ and O²⁻
TiO₂
Can compounds be separated into simpler substances ?
Yes
When do you use parethesis when forming a compound
You use them to separate multiple compounds
What is a monoatomic element?
an element that stays alone and never bonds, non-reactive
Which of the following are molecules
bromide gas
Which of the following element pairs would be most likely to form an ionic compound?
calcium; carbon Calcium carbide (CaC2CaC2) is a solid ionic compound used to produce acetylene gas (C2H2C2H2) for welding torch fuel.
Name this:
carbonate anion
Which of these pairs of elements is least likely to combine to form an ionic compound?
chlorine and oxygen
I sugar a compound or a pure substance
compound
How would you describe a metalloid
conducts heat/electricity well holds metals/non-metal properties
is Cl2 formed by a ionic or covelant bond
covalent
when is Di- used
dihydrogen (two Hydrogens in the compound)
Name this:
dihydrogen phosphate anion
What happens to electrons in a covalent bond
electrons are shared
What happens to electrons in an ionic bond
electrons are transferred
Name this:
hydrogen carbonate or bicarbonate anion
Is NaCl formed by a ionic or covalent bond
ionic
What is this: shiny, malleable, good conductors of heat and electricity.
metal
What does an ionic bond occur between
metal and nonmetal
What is this: conduct heat and electricity moderately well, and possess some properties of metals and some properties of nonmetals.
metalloid
The compound phosphorus trichloride contains phosphorus and chlorine. This compound is ________. (PCl3)
molecular (covalent)
Carbon dioxide is a _____ compound composed two types of _____ atoms.
molecular; nonmetal
a subscript of 2 would use a -ite or -ate (Ex: NO2 -)
nitrite -ite
What is this: appear dull, poor conductors of heat and electricity
nonmetal
How would you describe a non-metal
not good at conducting heat/electricity poor/dull
Is NO3- a oxyanion or a polyatomic ion
oxyanion
Is NH4+ a polyatomic ion or a oxyanion
polyatomic
What are oxyanions?
polyatomic ions that contain oxygen
How would you describe a metal
shiny, malleable good at conducting heat/electricity
when do you use a hypo- ClO- = hypochlorite
smallest number of oxygens)
(true/false) Ions of the same element all contain the same number of protons and only differ in their number of electrons.
true
(true/false) Metals and nonmetals generally form ionic compounds.
true
(true/false) Molecular compounds (covalent compounds) result when atoms share electrons
true
What does a covalent bond occur between
two non-metals
How does a molecule form
two or more atoms held together by covalent bonds
