Balancing equations
Types of reactions
Electron Configuration
Periodic table
100

What do you change in an equation to balance an equation?

Change the coefficients to make both sides balanced.

100

What kind of reaction involves 1 element replacing another in a compound?

Single replacement reaction.

100

What is the electron configuration of (Cr)?

1s2,2s2,2p6,3s2,3p4,3d5,4s1.

100

Which element has the highest electronegativity?

Fluorine (F)

200

 where is the subscript located in an equation?

To the right, below and element.

200

What kind of reaction involves a compound breaking up into simpler substances?

Decomposition reaction.

200

What is the electron configuration of (Fe)?

1s2,2s2,2p6,3s2,3p6,4s2,3d6.

200

What's the atomic number of gold (Au)?

79

300

 How do you check the balance of an equation?

Conservation of mass.

300

What are the signs of a chemical reaction?

Change in color, Temperature, odor.

300

How many unpaired electrons are in a Nitrogen atom?

3

300

Which element is in period 4 group 2?

Calcium (Ca)

400

what happens if coefficients are changed incorrectly?

The equation is unbalanced.

400

What way do you classify reactions?

Analyzing the elements and number of reactants or products.

400

How many valence electrons does (Cl) have?

7

400

What element is in group 15 and period 3?

Phosphorus (P)

500

Balance the equation: C6H12+O2>CO2+H2O?

C6H12+9O2>6CO2+6H2

500

 How can you identify a combustion reaction?

If O2 is by itself.

500

How many valence electrons are in the last shell of iron (Fe)?

8

500

Whats the lightest noble gas?

Helium (He)

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