Module 3 Lesson 3 Classwork

Front

What is the mass number of an atom?

Back

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

Front

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

Back

Number of neutrons = Mass number - Atomic number.

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 overall charge of an atom and why?

Back

The overall charge of an atom is neutral because it has an equal number of protons (positive charge) and electrons (negative charge).

Front

Define isotopes.

Back

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons.

Front

What is a nuclear symbol?

Back

A nuclear symbol represents an isotope of an element, showing the mass number as a superscript and the atomic number as a subscript.

Front

How many protons does an atom with an atomic number of 5 have?

Back

An atom with an atomic number of 5 has 5 protons.

Front

What is the relationship between protons and neutrons in isotopes?

Back

Isotopes of an element have the same number of protons but a different number of neutrons.

Front

What is the charge of a proton?

Back

The charge of a proton is +1.

Front

What is the charge of a neutron?

Back

The charge of a neutron is 0 (neutral).