Physical/Chemical Changes
This type of physical change occurs when a substance changes from solid to liquid.
Answer: What is melting?
The property that describes how well a substance can dissolve in water.
Answer: What is solubility?
This central part of the Bohr-Rutherford diagram contains protons and neutrons.
What is the nucleus?
This chart organizes all known elements based on their atomic number and properties.
What is the periodic table?
Matter is anything that has these two properties.
What are mass and volume?
A chemical change in which a gas is produced, like when vinegar reacts with baking soda.
What is a chemical reaction?
This physical property describes a substance's ability to be pulled into thin wires.
What is ductility?
In a Bohr-Rutherford diagram of an atom, these tiny particles orbit the nucleus in energy levels or shells.
What are electrons?
This number, found above the element symbol, tells you how many protons are in an atom
What is the atomic number?
A substance made of only one kind of atom is called this.
What is an element?
You tear a piece of aluminum foil into smaller pieces, but its composition stays the same. What type of change is this, and how do you know?
What is a physical change, because the substance's identity does not change—only its size and shape?
The amount of mass per unit of volume is called this.
Answer: What is density?
How many electrons are in the first, second, and third energy levels of a Bohr-Rutherford diagram before they are considered full?
What are 2, 8, and 8 electrons?
Elements in the same column (group) of the periodic table have this in common.
What are similar chemical properties or the same number of valence electrons?
A combination of two or more substances that are not chemically bonded is called this
What is a mixture?
This type of change happens when paper burns and turns into ash.
Answer: What is a chemical change?
This property refers to a substance's ability to be hammered into thin sheets.
Answer: What is malleability?
This element has 11 protons, 12 neutrons, and its Bohr-Rutherford diagram shows 3 energy levels. What is the element?
Answer: What is sodium?
This is the name for the elements found on the far right of the periodic table that are very stable and do not easily form compounds.
What are noble gases?
This type of mixture has the same composition throughout, like salt water.
What is a homogeneous mixture?
The process of fermentation, where yeast breaks down sugar into alcohol and carbon dioxide, is this type of change.
Answer: What is a chemical change?
This chemical property determines how likely a substance is to chemically react with another substance, such as oxygen or acid.
Answer: What is reactivity?
Use the Bohr-Rutherford diagram of an oxygen atom. How many protons, neutrons, and electrons should be included, and how are the electrons arranged?
What is 8 protons, 8 neutrons, and 8 electrons—2 in the first shell, 6 in the second shell?
These elements are located in the middle block of the periodic table, are often good conductors, and can form colorful compounds.
What are transition metals?
This type of matter has a fixed composition and properties and includes both elements and compounds.
What is a pure substance?