Exam-Atoms Modified

Question 1

What is the basic unit of a chemical element?

Answer 1

Atom

Atoms are the basic building blocks of ordinary matter.

Question 2

What are the three basic parts of an atom?

Answer 2

• Protons
• Neutrons
• Electrons

These parts are essential for the structure and properties of atoms.

Question 3

Where are protons located in an atom?

Answer 3

In the nucleus

Protons are positively charged subatomic particles.

Question 4

What determines the element’s electrical charge?

Answer 4

Protons

The number of protons in an atom defines the element and its charge.

Question 5

Where are neutrons located in an atom?

Answer 5

In the nucleus

Neutrons are neutral particles that contribute to the atom’s mass.

Question 6

What is the role of electrons in an atom?

Answer 6

Contribute to the atom’s mass

Electrons are negatively charged subatomic particles located outside the nucleus.

Question 7

Where are electrons located in an atom?

Answer 7

Outside the nucleus

Electrons orbit the nucleus and have a negligible mass compared to protons and neutrons.

Question 8

What does the Periodic Table show?

Answer 8

All the different elements

The Periodic Table organizes elements based on their atomic structure and properties.

Question 9

What is the formula for finding the atomic mass?

Answer 9

Protons + Neutrons = Atomic Mass

Atomic mass is the sum of protons and neutrons in an atom.

Question 10

What is the formula for finding the number of neutrons?

Answer 10

Atomic mass - Protons = Neutrons

This formula helps to determine the number of neutrons in an atom.

Question 11

True or False: Electrons have a positive charge.

Answer 11

False

Electrons are negatively charged subatomic particles.

Question 12

Fill in the blank: The basic building blocks of ordinary matter are _______.

Answer 12

Atoms

Atoms make up everything we see in the universe.