Matter to Modern Atom - Final Exam Review

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture that has a uniform composition throughout. An example is a sugar solution.

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances. An example is grilling meat.

Front

What is the shorthand electron configuration for Tin (Sn) with atomic number 50?

Back

The shorthand electron configuration for Sn is [Kr] 5s² 4d¹⁰ 5p².

Front

How do you calculate the number of neutrons in an atom?

Back

Number of neutrons = Mass number - Number of protons. For an atom with 10 protons and a mass of 18, it has 8 neutrons.

Front

What atom has the electron configuration [Xe] 6s² 5d⁹?

Back

The atom with this electron configuration is Gold.

Front

Define matter.

Back

Matter is anything that has mass and occupies space.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is the mass number of an atom?

Back

The mass number is the total number of protons and neutrons in an atom's nucleus.

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. An example is ice melting.