1
What is the smallest unit into which matter can be divided without the release of electrically charged particles?
What is an atom?
An atom that has gained or lost electrons is called this.
What is an ion?
Is this equation balanced?
2H₂ + O₂ → 2H₂O
What is yes?
Is this equation balanced?
Mg + O₂ → MgO
What is no?
In a balanced chemical equation, what must be the same on both sides?
A) The number of atoms of each element
B) The total number of molecules
C) The types of chemical bonds
D) The charges on every atom
What is A?
Is a proton positively or negatively charged?
What is positively charged?
This particle has no charge and is found in the nucleus.
What is a neutron?
In a chemical equation, the substances you start with are called:
A) Products
B) Reactants
C) Catalysts
D) Coefficients
What is B (reactants)?
Which type of reaction involves an element replacing another in a compound?
A) Single replacement
B) Double replacement
C) Combustion
D) Decomposition
What is A (single replacement)?
Is this equation balanced?
Na + Cl₂ → 2NaCl
What is no?
What type of charge does an electron have?
What is a negative charge?
This type of bond forms when electrons are transferred between atoms.
What is an ionic bond?
Which type of reaction occurs when two or more substances combine to form one product?
A) Decomposition
B) Synthesis
C) Combustion
D) Single replacement
What is B (synthesis)?
Which reaction is an example of synthesis?
A) 2Na + Cl₂ → 2NaCl
B) H₂O → H₂ + O₂
C) CH₄ + O₂ → CO₂ + H₂O
D) Zn + CuSO₄ → ZnSO₄ + Cu
What is A?
Is this equation balanced?
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
What is yes?
The number of protons in an atom defines this property.
What is atomic number?
In a neutral atom, the number of electrons equals this.
What is the number of protons?
In a chemical equation, the substances formed are called:
A) Reactants
B) Compounds
C) Products
D) Neutrons
What is C (products)?
When two compounds exchange “partners” to form two new compounds, the reaction is:
A) Single replacement
B) Double replacement
C) Synthesis
D) Decomposition
What is B (double replacement)?
Which reaction is an example of double replacement?
A) 2K + Br₂ → 2KBr
B) H₂O₂ → H₂O + O₂
C) AgNO₃ + NaCl → AgCl + NaNO₃
D) C₃H₈ + O₂ → CO₂ + H₂O
What is C?
Electrons are arranged in these around the nucleus.
What are energy levels (or shells)?
The sum of protons and neutrons in the nucleus equals this number.
What is the mass number?
The reaction 2H₂O → 2H₂ + O₂ is an example of:
A) Combustion
B) Decomposition
C) Double replacement
D) Synthesis
What is B (decomposition)?
Combustion reactions usually involve a substance reacting with:
A) Nitrogen
B) Hydrogen
C) Oxygen
D) Carbon dioxide
What is C (oxygen)?
Which reaction is an example of decomposition?
A) 2K + Cl₂ → 2KCl
B) H₂CO₃ → H₂O + CO₂
C) NaOH + HCl → NaCl + H₂O
D) Fe + CuSO₄ → FeSO₄ + Cu
What is B?