Chemistry Review (1st sem.)

Vocab

100

The electrons in the outermost ring of an atom are known as _________ electrons.

Valence

200

The small number next to an element symbol (ex. CO₂) is known as a....

Subscript

300

The center of the atom is known as the...

Nucleus

400

The large number in front of a chemical formula (ex. 3CO) is known as a...

Coefficient

500

There are three subatomic particles in an atom. One is positive, one is neutral, and one is negative. Name all 3.

Proton, neutron, electron

Naming

100

Name this: NaCl

Sodium chloride

200

Write the formula for: carbon tetrafluoride

CF₄

300

Write the name for: FeCl₃

Iron (III) chloride

400

Write the formula for: silver (II) nitrate

Ag(NO₃)₂

500

Write the name for: Co(SCN)₃

Cobalt (III) thiocyanate

Balancing

100

__Fe + __Cl --> __FeCl₃

Fe + 3Cl --> FeCl₃

200

___ Na + ___ O₂ --> ___ Na₂O

4Na + O₂ -->2Na₂O

300

___ N₂ + ___ O₂ --> ___ N₂O₅

2N₂ + 5O₂ --> 2N₂O₅

400

___ Rb + ___ RbNO₃ -->  ___ Rb₂O + ___ N₂

10Rb + 2RbNO₃ --> 6Rb₂O + N₂

500

___C₆H₆ + ___O₂ --> ___CO₂ + ___H₂O

2C₆H₆ + 15O₂ --> 12CO₂ +6H₂O