Intro to Atoms and Molecules

Matter and Atoms (Take Two)

Take notes, there will be questions at the end!

Open Ended

Aside from plasma, what are the three main states of matter?

What's the matter with matter?

• Matter is the substance that all physical objects are made of.

• Matter is all around you. Everything you see is matter.

• All of this matter is made of small particles.

• The small particles are made of smaller particles.

Open Ended

What are 3 examples of matter that are around you?

What's an atom?

• The basic unit of matter is an atom

• Atoms are the smallest units when it comes to matter

• Everything in our world is made up of atoms!

What are the parts of an atom?

• At the center of an atom is its nucleus.

• Protons are positively charged particles in the nucleus.

• Also in the nucleus are neutrons with no electrical charge.

• Orbiting the nucleus are tiny electrons. Electrons are negatively charged.

Atoms (continued)

• An atom with the same number of protons and electrons is electrically neutral.

• If the atom has more or less electrons to protons it is called an ion.

• An ion will have positive charge if it has more protons than electrons.

• It will have negative charge if it has more electrons than protons.

What's an element?

• An atom is the smallest unit of a chemical element.

• That is, an atom has all the properties of that element.

• All atoms of the same element have the same number of protons.

• An elements atomic number tells us how many protons the element has

Elements can be found on the PERIODIC TABLE OF ELEMENTS!

Multiple Choice

What is the smallest piece of matter that still has properties of that matter?

• element

• atom

• proton

Multiple Choice

Positively charge particle

• proton

• neutron

• electron

Multiple Choice

Negatively charged particle

• proton

• neutron

• electron

Multiple Choice

Neutral charge particle

• proton

• neutron

• electron

Multiple Choice

Matter is anything that takes up space

• True

• False

Multiple Choice

The three main states of matter are:

• Solid and liquid

• Solid, liquid and gas

• Plasma, liquid and solid

Multiple Choice

A solid keeps its shape

• False

• True

Multiple Choice

Liquids take the shape of their container

• False

• True

Multiple Choice

Gases fill their entire container

• False

• True