Standard 9.1: Atoms SUMMATIVE

Front

What is the Atomic Number?

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 Atomic Mass?

Back

The Atomic Mass is the weighted average mass of an element's isotopes, measured in atomic mass units (amu).

Front

How many protons are in an atom of Nitrogen?

Back

An atom of Nitrogen has 7 protons.

Front

How many neutrons are in Nitrogen-14?

Back

Nitrogen-14 has 7 neutrons (14 - 7 = 7).

Front

How many electrons are in a neutral atom of Nitrogen?

Back

A neutral atom of Nitrogen has 7 electrons.

Front

What happens when Nitrogen gains an electron?

Back

When Nitrogen gains an electron, it becomes a negatively charged ion (anion).

Front

What is an Isotope?

Back

An Isotope is a variant of an element that has the same number of protons but a different number of neutrons.

Front

What is the notation for Isotopes?

Back

Isotopes are often represented as Element-Mass Number (e.g., Nitrogen-14 or N-14).

Front

What is the charge of a Nitrogen ion that has gained an electron?

Back

The charge of a Nitrogen ion that has gained an electron is -1.

Front

What is the significance of the Atomic Number in the periodic table?

Back

The Atomic Number determines the position of an element in the periodic table and its chemical properties.