Chapter 10 & 11 Unit Test

Front

What is the nucleus of an atom?

Back

The nucleus is the central part of an atom, containing protons and neutrons, but not electrons.

Front

What is the symbol for Hydrogen?

Back

H

Front

What type of elements are most commonly found on the Periodic Table?

Back

Most elements on the Periodic Table are metals.

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.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances.

Front

What is the Plum Pudding Model?

Back

The Plum Pudding Model is an early 20th-century model of the atom that proposed that electrons are embedded in a positively charged 'soup'.

Front

What is the Planetary Model of the atom?

Back

The Planetary Model describes the atom as having a nucleus surrounded by electrons that orbit in fixed paths, similar to planets around the sun.

Front

What is the Electron Cloud Model?

Back

The Electron Cloud Model describes the regions around the nucleus where electrons are likely to be found, rather than fixed orbits.

Front

What is an example of a physical change?

Back

Water evaporating from a pond is an example of a physical change.

Front

What is an example of a chemical change?

Back

Rust forming on iron is an example of a chemical change.