Atoms and Elements

Unit 1: Matter, Atoms, and the Periodic Table

What will you learn today?

Goals:

• Define the study of chemistry

• Understand the structure of an atom

• Begin to read a periodic table

• Understand the differences in elements, compounds and mixtures

• Begin to understand how chemical bonds work

Anything that takes up space and has mass.

What is Matter?

The simplest form of matter with its own unique set of properties, it cannot be broken down into any simpler substances

What is an Element?

Elements are made of Atoms:
And atom is the smallest unit of an element that will retain the unique properties of the element.

What are Elements made of?

subatomic particles
Protons, Neutrons and Electrons

Every atom of the same element is identical

​

Atoms are made of...

Multiple Choice

What are the subatomic particles?

• Protons, Electrons, Neutrons

• Molecules, and atoms

• Electrons, Protons, Nucleus

• Nucleus, and Electrons

Multiple Choice

What is this subatomic particle that has positive charge?

• Electron

• Neutron

• Proton

• Megatron

Multiple Choice

What is the smallest unit of matter? It is composed of protons and neutrons, held together in the nucleus, and electrons around the nucleus in different electron orbitals, which form an electron cloud.

• cell

• nucleus

• atom

• electron

Multiple Choice

What mass does a neutron have?

• 1 amu

• 0 amu

• -1 amu

• +2 amu

Multiple Choice

Complete the missing label on the diagram.

• Neutron
• Centre
• Nucleus
• Sub atomic particle

Multiple Choice

What subatomic particles would you find in the nucleus of an atom?

• Protons only
• Protons and Neutrons
• Neutrons and Electrons
• Protons and Electrons 

Multiple Choice

The electron is not included in the calculations for the atomic mass because

• It has negative charge

• It is located in the outer energy levels of the atom

• Its mass is basically zero

• It attracts neutral particles

Multiple Choice

An atom has 9 protons, 10 neutrons, and 9 electrons.

What is the charge on this atom?

• -1

• 0

• +1

• 19

• 18

Multiple Choice

An atom has 8 protons, 8 neutrons, and 10 electrons.

What is the mass of this atom?

• 8

• 16

• 18

• -2

Multiple Choice

What is the name of this element?

• Na

• periodic table

• sodium

Multiple Choice

What is the atomic symbol of this element?

• Na

• 11

• sodium

Multiple Choice

What is the atomic number of this element?

• 22.990

• 11

• sodium

• Na

Multiple Choice

How many protons does Sodium have?

• 22.990

• 11

Multiple Choice

If this is a neutral atom, how many electrons does Sodium have?

• 22.990

• 11

Multiple Choice

The average number of protons and neutrons is called the-

• atomic symbol

• atomic mass

• atomic number

• atom

Poll

Which of these do you feel you need more practice?

• All of it

• I feel good about it

• atomic mass and atomic number

• atomic symbol and name of the atom