09 Atomic Structure PRE-Assessment

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

Front

What are protons?

Back

Protons are positively charged particles found in the nucleus of an atom.

Front

What are neutrons?

Back

Neutrons are neutral particles found in the nucleus of an atom.

Front

What are electrons?

Back

Electrons are negatively charged particles that orbit the nucleus of an atom.

Front

What is the atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

What is the mass number?

Back

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

Front

What is a valence electron?

Back

Valence electrons are the electrons in the outermost shell of an atom that determine its reactivity.

Front

What does it mean for an atom to be reactive?

Back

A reactive atom is one that can easily form bonds with other atoms due to its valence electrons.

Front

Which atom is least reactive: Lithium, Fluorine, or Aluminum?

Back

Aluminum is least reactive because it has 3 valence electrons.

Front

What is the relationship between protons and atomic number?

Back

The atomic number is equal to the number of protons in an atom.