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
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
How many Aluminum atoms do we have in the products?
Al + O2 → Al2O3
2
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
Atoms are made up of smaller particles called subatomic particles. Which is a subatomic particles that has no charge:
Neutrons
What does an atom of the element with atomic number 6 always have?
6 protons
How are elements arranged in the periodic table?
By increase in the atomic number.
Horizontally in periods
Vertically in groups
Is this equaction a balanced or not balanced chemical equation?
P4 + O2 → P4O6
Not balanced
How many oxygen are in 2C6H8O7
14
The elements to the left of the zigzag line.
Metals
All of the following are examples of chemical change except:
Increase in temperature, release of light, formation of a solid, melting of ice
melting of ice