2.1 Atoms and Elements

• Chem
• Secondary Education

Lesson 2.1 Atoms and Elements

05-09-2022

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REVIEW OF PREVIOUS

 LESSON

Lesson 2.1 Atoms and Elements

05-09-2022

CREATIVE OUTPUT 1 

Make an atomic model using reusable materials.

Check page 44 of your coursebook.

Due date: September 13, 2022

Difference between
physical and
chemical property

Chem Question 

What will you see inside an atom if you're able to enter one?

All substances are made of tiny building blocks known as atoms.

AGREE

DISAGREE

NOT SURE

The electrons move very fast around the nucleus in orbital paths called shells.

AGREE

DISAGREE

NOT SURE

Which part of the atom determines the mass of the atom itself?

1. electron
2. proton
3. nucleus
4. neutron

Relative atomic mass (or atomic mass unit)

 Proton Number

05-09-2022

Atomic number is the same as the proton number.

AGREE

DISAGREE

NOT SURE

In a neutral atom, the number of protons is equal to the number of ____________.

1. electrons
2. protons
3. nuclei
4. neutrons

The proton number determines the position of the element in the periodic table.

AGREE

DISAGREE

NOT SURE

 Mass Number

05-09-2022

Which of the following is the total number of protons and neutrons in the nucleus of an atom?

1. atomic mass
2. nucleon number
3. mass number
4. options B and C

What is the symbol for the nucleon number?

1. A
2. Z
3. B
4. X

How will you get the number of neutrons?

Proton + Neutron are collectively known as _________.

1. nucleus
2. nucleon
3. mass number
4. atomic mass

This is an example of ____________.

1. scientific notation
2. math notation
3. atomic notation
4. a diagram

How will you get the number of protons?

Key terms:

- Proton number (a.k.a. atomic number)

- Electron number

- Mass number (Nucleon number)

- Neutron number

Practice

05-09-2022

Rate your understanding of the topic using the scale below.

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