The law of conservation of mass states that mass cannot be created or destroyed in a chemical reaction.
What is the difference between a physical change and a chemical change?
A physical change only affects the physical properties of a substance, while a chemical change results in the formation of new substances.
What is an element?
An element is a pure substance made up of only one type of atom.
What are the three states of matter?
The three states of matter are solid, liquid, and gas.
What is the difference between a mixture and a compound?
A mixture is a combination of two or more substances that are not chemically bonded, while a compound is a substance made up of two or more elements chemically bonded together.
What is the atomic number?
The atomic number is the number of protons in the nucleus of an atom.
What is the difference between an atom and a molecule?
An atom is the smallest unit of an element that retains its chemical properties, while a molecule is a group of two or more atoms chemically bonded together.
What is the periodic table?
The periodic table is a tabular arrangement of chemical elements, organized based on their atomic numbers and chemical properties.
What is a chemical reaction?
A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.
What is an ion?
An ion is an atom or molecule that has gained or lost one or more electrons and has a positive or negative charge.
What is the difference between a heterogeneous mixture and a homogeneous mixture?
A heterogeneous mixture is a mixture where the substances are not evenly distributed, while a homogeneous mixture is a mixture where the substances are evenly distributed.
What is the difference between a physical property and a chemical property?
A physical property can be observed or measured without changing the composition or identity of a substance, while a chemical property describes how a substance reacts with other substances to form new substances.
What is the difference between a nucleus and an electron cloud?
The nucleus is the central part of an atom that contains protons and neutrons, while the electron cloud is the region surrounding the nucleus where electrons are found.
What are elements made up of?
Elements are made up of atoms.
What is the smallest unit of a compound?
The smallest unit of a compound is a molecule.
What is the law of conservation of mass?
The law of conservation of mass states that mass cannot be created or destroyed in a chemical reaction.
What is the difference between a physical change and a chemical change?
A physical change only affects the physical properties of a substance, while a chemical change results in the formation of new substances.
What is an element?
An element is a pure substance made up of only one type of atom.
What are the three states of matter?
The three states of matter are solid, liquid, and gas.
What is the difference between a mixture and a compound?
A mixture is a combination of two or more substances that are not chemically bonded, while a compound is a substance made up of two or more elements chemically bonded together.
What is the atomic number?
The atomic number is the number of protons in the nucleus of an atom.
What is the difference between an atom and a molecule?
An atom is the smallest unit of an element that retains its chemical properties, while a molecule is a group of two or more atoms chemically bonded together.
What is the periodic table?
The periodic table is a tabular arrangement of chemical elements, organized based on their atomic numbers and chemical properties.
What is a chemical reaction?
A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.
What is an ion?
An ion is an atom or molecule that has gained or lost one or more electrons and has a positive or negative charge.
What is the difference between a heterogeneous mixture and a homogeneous mixture?
A heterogeneous mixture is a mixture where the substances are not evenly distributed, while a homogeneous mixture is a mixture where the substances are evenly distributed.
What is the difference between a physical property and a chemical property?
A physical property can be observed or measured without changing the composition or identity of a substance, while a chemical property describes how a substance reacts with other substances to form new substances.
What is the difference between a nucleus and an electron cloud?
The nucleus is the central part of an atom that contains protons and neutrons, while the electron cloud is the region surrounding the nucleus where electrons are found.