Counting atoms and balancing equations

Here are the directions:

1. Identify the elements on both sides of the equation.

2. Count the atoms of each element on both sides of the equation.

3. Use coefficients when needed to balance the

equation.

Example:

Ca + O2 --> CaO

Ca - 1 Ca - 1

O - 2 O - 1

Quiz:

1. N2 + H2 -->NH2

2. K + Cl2 --> KCl

3. K + Br2 -->KBr

Electrons are extremely important to what area of technology? a) anti-aging research b) household product development c) electronics d) drug discovery

Which statement correctly describes metallic bonds? a. they form when certain atoms lose electrons and other atoms gain electrons. b. they involve an attraction between anions and cations. they always involvpoth a metal and a nonmetal. d. they can only form between atoms of the same element. e. they form because electrons can move freely between atoms.

What is the formula for the compound dinitrogen pentoxide? a. n4o5 b. n5o4 c. n4o6 d. n5o2 e. n2o5