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