Science Exam: Chemical Bonding

58 terms by mjrainier

Create a new folder

Advertisement Upgrade to remove ads

The attraction between a positive metal ion and the electrons surrounding it is a

metallic bond

What is the chemical name for the compound with the formula Na2S?

Sodium Sulfide

In what form can an ionic compound conduct electricity?

when dissolved in water

Ions that are made of more than one atom are examples of.....

polyatomic ions

A chemical bond formed when two atoms share electrons is called a(n) __________-

covalent bond

Each family in the periodic table has its own characteristic properties based on the number of ____________.

valence electrons

Ionic compounds are electrically_______________.

neutral

A mixture that is made of two or more elements--one that is a metal----that has the properties of metal is a(n) ____________________.

alloy

A covalent bond in which electrons are shared unequally is ___________.

polar

An ionic bond is the attraction between __________.

oppositely charged ions.

Which of the following best describes a metal crystal?

positive metal ions surrounded by freely moving valence electrons.

Water is polar and oil is nonpolar. What happens when the two liquids are poured into the same container?

The liquids do not mix.

Which of the following terms means that metals can be rolled into thin sheets, as in aluminum foil, or beaten into complex shapes?

malleable

When an atom loses an electron, it becomes a _____________.

positive ion

Magnesium bromide is an ionic compund with the chemical formula MgBr2. What does the "2" tell you?

There are two bromide ions for every magnesium ion.

Steel is an alloy of one or more elements combined with _______.

iron

Which of the following is a characteristic property of ionic compounds?
a. They contain no charged particles
b. They form hard, brittle crystals with characteristic shapes
c. They have low melting points
d. They have low boiling point

b. They form hard brittle crystals with characteristic shapes

If atoms of a halogen nonmetal (Group 17) gain one electron, the atoms then have _____________.

8 valence electrons

In the chemical formula for an ionic compound, which item is written first?

positive ion

What is a double bond?

two pairs of electrons shared between two atoms

Electrons involved in bonding between atoms are __________.

valence electrons

What is the greatest number of valence electrons an atom can have?

8

Which of the following properties is NOT characteristic of steel?
a. strength
b. resistant to rust
c. does not readily react with water
d. reacts readily with air

reacts readily with air

True or False: Each family in the periodic table has its own characteristic properties based upon its number of valence electrons.

True

True or False: The attraction between a positive ion and a negative ion results in a covalent bond.

False, ionic

True or False: When electrons are shared between two atoms, a covalent bond is formed.

False. ionic bond

True or False: In every alloy, at least one of the components is a metal.

True

In an electron dot diagram of aluminum (Al), how many dots should be drawn around the elements symbol? Why? (see diagram)

3 dots because its in Group 3.

List three elements from the group containing the most reactive nonmetals (see diagram).

Chlorine, Florine, Bromine

What is the symbol for a calcium ion (see diagram)?

Ca2+

Which is a property shared by most molecular compounds?

low melting point

Molecular compounds do not conduct electricity because they....

do not break up into ions

Molecules that contain two polar bonds are

sometimes polar

What is an advantage that alloys might have over many pure metals?

Alloys resist rust

Brass and steel are examples of__________

alloys

What strong alloy, containing carbon, iron, and another metal like chromium or nickel, is used to make construction equipment, bicycle frames, and train rails?

steel

Which term means that metal can be pulled into thin strands or wires?

Ductile

True or False: Whan an atom gains an electron it becomes a positive ion.

False. It becomes a negative ion

True or False. Orderly crystal shapes, high melting points, and electrical conductivity when dissolved in water are properties of ionic compounds.

True

True or False: A nonpolar bond is formed when two atoms share electrons unequally.

False. a polar bond is formed

True or False: Steel is an alloy of iron with carbon, nickel, and other elements

True

Chemical bonds form when valence electrons are ______________ between atoms.

transferred/shared

In the periodic table, atoms are arranged from left to right and from top to bottom in order of increasing ____________.

atomic number

With the exception of helium, Group 18 elements usually have ___________ valence electrons, so they do not usually react with other elements.

eight

Nitrate, ammonium, and carbonate are examples of _____________________ ions.

polyatomic

When ions have a positive charge form bonds with ions having negative charge, the charge on the resulting compound is ____________.

zero

Fluorine is a _____________ molecule because the valence electrons are shared equally between the two fluorine atoms.

nonpolar

Solid metal are good conductors of heat and ______________.

electricity

Element in Group1 lose one electron to form ions with with a ____________ charge.

positive 1

In a double covalent bond, _________ electrons are shared between two atoms.

four or 2 pairs

how many atoms of a Group 17 element would be needed to react with one atom of a Group 2 element? Explain. (see diagram)

2 because it will have to give up both and elements in group 17 only need one more

Which group of elements loses electrons most easily?

Group 1

Which group contains elements with two valence electrons?

Group 6

What is the charge for a Lithium Ion (see table)

1+

What is the chemical formula for the compound that forms when sodium and chlorie combine? (see table)

Na+ Cl-

What is the chemical name for CaCO3? (see table)

Calcium Carbonate

What is the name of the ion with the chemical formula NO3+? (see table)

Nitrogen

Which of these ions are polyatomic? Explain (see table).

Nitrogen because it has more than one ion in it.

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set