Vocabulary
Chemical
Formulas
Ionic
Bonds
Covalent
Bonds
Hydrogen
Bonds
100

Two or more atoms bonded together

Molecule

100

What are the names of the two elements in CO2?

Carbon & Oxygen

100

What is the name for an ion that has a positive charge? (cation or anion)

Cation

100

A covalent bond is a bond between atoms where they ______ at least one electron.

Share

100

TRUE or FALSE: Hydrogen bonds are the strongest kind of chemical bond.

FALSE: Hydrogen bonds are weak bonds.

200

A molecule that has more than one element in it

Compound

200

How many atoms are in the molecule CH4?

5 atoms

200

What is the name for an ion that has a negative charge? (cation or anion)

Anion

200

What is the only element that forms covalent bonds and needs only 2 electrons in its outer energy level in order to be stable?

Hydrogen

200
Does a hydrogen bond form between two individual atoms, or between two molecules?
A hydrogen bond forms between two molecules.
300

A substance that is a combination of atoms and/or molecules, but they are not bonded together.

Mixture

300

How many atoms of Silicon are in the molecule H2SiO3?

1 atom of Silicon

300

Ionic Bonds form between ions that have ______________ charges. (same or opposite)

Opposite charges

300

How many electrons do most elements need in their outer energy level in order to be stable?

Eight electrons

300

Which vocabulary word means: The condition of having poles (a positive pole and a negative pole)

Polarity

400

An atom that has a positive or negative charge because it has lost or gained electrons

Ion

400

How many atoms are in the molecule C6H12O6?

24 atoms

400

If two negative ions get close to each other, will they attract each other or repel each other?

Repel each other

400

TRUE or FALSE: Atoms in a covalent bond can share 3 electrons.

False: Atoms in a covalent bonds can share 2 electrons (single bond) or 4 electrons (double bond), but not 3.

400

Hydrogen bonds are responsible for many of the physical properties (like surface tension and condensation) of which substance?

Water

500

Not likely to react with other atoms

Stable

500

What is the chemical formula for a molecule with these atoms: hydrogen, hydrogen, carbon, oxygen, oxygen, oxygen?

H2CO3

500

Do ionic bonds form molecules?

No, they form ionic compounds that look like crystals.

500

What is the largest number of electrons that can be shared between two atoms in a covalent bond?

Six electrons (this is called a triple bond)

500

Which atom in a water molecule has a slightly negative charge? (oxygen or hydrogen)

Oxygen because it has high electronegativity and pulls the shared electrons closer to it.