Chemical Reactions
In a chemical reaction the substances to the right of the arrow are called this/these?
What is/are products?
What are the parts of a chemical reaction?
Reactants and products
A substance that enters a chemical reaction is called this.
a reactant
The 18 vertical columns on a periodic table are called
groups
What is it called when both sides of a chemical equation have equal numbers of each element?
Balanced
hydrogen + oxygen → water
Where are the reactants and products in this chemical reaction?
Reactants: hydrogen and oxygen
Products: Water
In the formula 5CaSO4,how many oxygen atoms do we have?
20
All of the following are examples of chemical change except:
Increase in temperature, release of light, melting of ice
melting of ice
What do we call the elements on the right side of the periodic table?
Nonmetals
What is it called when both sides of a chemical equation do not have equal numbers of each element?
unbalanced
How many Carbons are there in NaHCO₃?
1
What do we call this:
A + B → AB?
A chemical reaction
Is this a balanced or not balanced equation?
H2S + NaCl → HCl + Na2S
Not balanced
In an atom what subatomic particle that has no charge:
Neutrons
Matter can not be created nor destroyed, just rearranged is the Law of Conservation of
Mass
How many oxygen are in 2C6H8O7
14
The horizontal rows 1-7 across a periodic table are called
Periods
What does an atom of the element with atomic number 6 always have?
6 protons
The atomic mass minus the protons in an element equals the number of
neutrons
Is this equaction a balanced or not balanced chemical equation?
P4 + O2 → P4O6
Not balanced