Physical Science Ch 1-4 Semester exam

Front

What do protons and neutrons collectively form?

Back

Nucleus

Front

Define a liquid.

Back

Definite volume, indefinite shape

Front

Who proposed the theory that atoms orbit the nucleus in specific orbits?

Back

Bohr

Front

Elements that have the same number of protons but different number of neutrons are called?

Back

Isotopes

Front

What is the correct order of Atomic Theory Timeline?

Back

Democritus, Dalton, Thomson, Rutherford, Bohr

Front

What is the charge of a proton?

Back

Positive

Front

What is the charge of a neutron?

Back

Neutral

Front

What is the charge of an electron?

Back

Negative

Front

What is an atom?

Back

The basic unit of a chemical element.

Front

What is the difference between an element and a compound?

Back

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