Chemical Formulas
The small numbers to the bottom right of a symbol in a chemical formula
What is a subscript?
When a chemical equation has the same number and type of atoms on each side of the arrow we say it is this.
What is balanced?
Bananas turning brown is an example of a chemical change because ____.
What is a color change?
In a chemical reaction, what do we know about the amount of the reactants and the products?
What is they must be equal?
The charge of a proton is this.
What is positive?
The big number out front of a chemical formula that shows how many molecules are present
What is a coefficient?
The substances on the left side of the arrow in a chemical equation are called this.
What are reactants?
Mixing baking soda and vinegar and getting foam is an example of a chemical reaction because ____.
What is gas production?
The Law of Conservation of Mass states that ___.
What is "Matter cannot be created or destroyed?"
The charge of a neutron is this.
What is no charge/neutral?
The number of oxygen atoms in this formula:
C6H12O6
What is 6?
The substances on the right side of the arrow in a chemical equation are called this.
What are products?
Boiling water is not an example of a chemical reaction because ____?
What is there is no chemical change in the substance? In the end it is still water.
If we start with 127 grams of reactant this much product must be produced in the reaction.
What is 127 grams?
Atoms in group 1 on the periodic table have this reactivity.
What is highly reactive?
The number of nitrogen atoms in this formula:
(NH4)2CO3
What is 2?
When we see the arrow in a chemical equation we say this.
What is yields?
Elephant toothpaste produced foam and got hot. We know this is a chemical reaction because ____. Give both reasons.
Substance AB breaks into substances A + B. How much AB did we start with in this reaction?
AB ----> A + B
?g 14.00g + 7.5g
What is 21.5grams?
An atom has a 7 protons and 8 neutrons in its nucleus. Its atomic mass is this.
The total number of atoms on the reactant side of this equation:
C6H12O6 + 6O2 --> 6CO2 + H2O
What is 36?
Examine the chemical equation below and determine if it is balanced or unbalanced.
NaHCO3 --> Na2CO3 + H2O + CO2
What is unbalanced?
A solid formed where there was no solid before is called this.
What is a precipitate?
Substance C reacts with substance D to produce substance CD. How much of substance D was used in this reaction?
C + D ----> CD
8g + ? -----> 19g
What is 11 grams of D?
Elements in the same group on the periodic table have the same number of these.
What is valence electrons?