Balancing equations
What do you change in an equation to balance an equation?
Change the coefficients to make both sides balanced.
What kind of reaction involves 1 element replacing another in a compound?
Single replacement reaction.
What is the electron configuration of (Cr)?
1s2,2s2,2p6,3s2,3p4,3d5,4s1.
Which element has the highest electronegativity?
Fluorine (F)
where is the subscript located in an equation?
To the right, below and element.
What kind of reaction involves a compound breaking up into simpler substances?
Decomposition reaction.
What is the electron configuration of (Fe)?
1s2,2s2,2p6,3s2,3p6,4s2,3d6.
What's the atomic number of gold (Au)?
79
How do you check the balance of an equation?
Conservation of mass.
What are the signs of a chemical reaction?
Change in color, Temperature, odor.
How many unpaired electrons are in a Nitrogen atom?
3
Which element is in period 4 group 2?
Calcium (Ca)
what happens if coefficients are changed incorrectly?
The equation is unbalanced.
What way do you classify reactions?
Analyzing the elements and number of reactants or products.
How many valence electrons does (Cl) have?
7
What element is in group 15 and period 3?
Phosphorus (P)
Balance the equation: C6H12+O2>CO2+H2O?
C6H12+9O2>6CO2+6H2
How can you identify a combustion reaction?
If O2 is by itself.
How many valence electrons are in the last shell of iron (Fe)?
8
Whats the lightest noble gas?
Helium (He)