Atomic Structure
This is the smallest unit of matter that retains the properties of an element.
What is an atom
This element has the chemical symbol H
What is hydrogen
A substance with a pH below 7 is classified as this.
What is an acid?
This type of reaction releases heat energy
What is an exothermic reaction
This type of change does not result in the formation of a new substance
What is a physical change
These positively charged particles are found in the nucleus of an atom.
What are protons
This number determines an element's position on the periodic table
What is the atomic number
This scale is used to measure how acidic or basic a solution is.
What is pH scale
This law states that mass is neither created nor destroyed in a chemical reaction.
What is the Law of Conservation of Mass
A mixture with evenly distributed particles is called this
What is a homogeneous mixture
These negatively charged particles orbit the nucleus
What is an electron
This highly reactive element has the symbol Na
What is sodium
A substance with a pH above 7 is classified as this.
What is a base
This type of reaction forms a solid when two solutions are mixed
What is a precipitation reaction
This process separates substances based on differences in boiling points
What is Distillation
This part of the atom contains both protons and neutrons.
What is the nucleus
Elements in the same column share similar properties because they have the same number of these.
What are valence electrons
This ion is released by acids when dissolved in water.
What is a hydrogen ion
This gas is commonly produced when an acid reacts with a metal
What is hydrogen gas
this unit is used to measure the amount of a substance
What is a mole
These electrons are found in the outermost energy level of an atom.
What are valence electrons
This scientist is known as the creator of the first modern periodic table.
Who is Dmitri Mendeleev
This type of reaction occurs when an acid and a base produce salt and water
What is neutralization reaction
This substance speeds up a chemical reaction without being consumed
What are catalyst
This type of bond involves the sharing of electrons between atoms
What is a covalent bond