Chemical Reactions
This reaction involves two substances combining to form one compound
What is a synthesis reaction?
Melting ice is an example of this type of change.
What is a physical change?
This subatomic particle has a positive charge and is found in the nucleus
What is the proton
In H₂O, the number of hydrogen atoms is this.
What is 2
Density is calculated by dividing this by this.
D=M/V
What is mass divided by volume?
In this reaction, one element replaces another in a compound.
What is a single replacement reaction?
Rust forming on iron is an example of this change.
Answer: What is a chemical change?
This subatomic particle has no charge and is located in the nucleus.
What is the neutron
In CO₂, the number of oxygen atoms is this.
What is 2?
A block has a mass of 45 g and a volume of 15 mL. Its density is this.
Answer: What is 3 g/mL? (45 ÷ 15)
What is 3g/mL? (45/15)
This type of reaction breaks a compound into simpler substances.
What is a decomposition reaction?
Breaking a glass represents this kind of change.
What is Physical change?
This negatively charged particle orbits the nucleus.
What is the electron?
In CaCl₂, there are this many chlorine atoms
What is 2?
If a rock has a density of 2.5 g/mL and a volume of 12 mL, its mass is this.
Answer: What is 30 g? (2.5 × 12)
What is 30g? (2.5x12)
Two compounds exchange ions to form two new compounds in this reaction.
What is a double replacement reaction?
Burning paper is an example of this change.
Answer: What is a chemical change?
Most of an atom’s mass is located in this part.
What is the nucleus?
In Al₂(SO₄)₃, the total number of oxygen atoms is this.
What is 12? (3x4+12)
If the meniscus sits exactly at 48 mL, the volume of the liquid is this.
What is 48 mL?
This reaction involves oxygen and releases energy, often as heat or light.
What is a combustion reaction?
A gas forming when vinegar and baking soda mix is this type of change.
What is a chemical change?
These particles are important because they are involved in chemical bonding.
Answer: What are electrons?
What is the nucleus
The difference between a coefficient and a subscript in a chemical formula is this.
If a coefficient shows the number of molecules, while a subscript shows the number of atoms of an element in a molecule?
Using water displacement, if the water rises from 50 mL to 62 mL, the volume of the object is this.
What is 12 mL? (62-50)