# Identify and describe the particles that make an atom.

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Identify and describe the particles that make an atom.
OBJECTIVE: Identify and describe the particles that make an atom. WARMUP: What are the 3 particles inside an atom & what charge does each have?

VOCABULARY Protons: small particles in the nucleus of an atom. They have a positive charge. Neutrons: small particles in the nucleus of an atom. They have no charge. Electrons: tiny particles of an atom that move around the nucleus. They have a negative charge. + N -

How can scientists see atoms?

ALSO: Complete BrainPop Activity worksheet
Atoms ALSO: Complete BrainPop Activity worksheet

Science Notes: Periodic Table
Name: Date: Class#: Science Notes: Periodic Table 1 H Hydrogen 1.008 atu

1 1 H 1.008 atu Hydrogen Science Notes
Name: Date: Period#: This is called the atomic number. It is always equal to the number of protons Also, electrons = protons (Write this in your vocabulary!) Science Notes 1 1 H We round this number off to the nearest whole number, so for Hydrogen the mass is 1 atu Hydrogen The mass is measured in atomic units = atu Students add red parts to vocab. section 1.008 atu This is called the atomic mass and is equal to protons + neutrons. (more vocabulary!) Atomic Mass - Protons= # of Neutrons (add to 3rd box)

1 1 H 1.008 atu Hydrogen Science Notes
Name: Date: Period#: Make your Notes pg. match this slide! atomic number = protons = electrons Science Notes 1 1 H Element Symbol Round this number off to the nearest whole number Ex: Element Name Hydrogen 1.008 atu atomic units = atu atomic mass = protons + neutrons Atomic mass – Atomic # = # of Neutrons “Nucleus #”

1 H 1 atu Hydrogen Lets draw a hydrogen atom… + = protons = electrons
= protons + neutrons

HYDROGEN + Proton (+) Electron (-)
Have students take notes as we draw a H atom together. Then show them the next slide and ask them to tell you what the atomic number/mass would be for Helium. Electron (-)

2 He Helium 4.003atu Draw a Helium atom = protons = electrons
Have students take notes as we draw a H atom together. Then show them the next slide and ask them to tell you what the atomic number/mass would be for Helium. Round off to 4 – 2 = 2 neutrons

HELIUM proton (positive) + neutron + (neutral) electron (Negative)

Draw a Carbon atom 6 C Carbon 12.011atu

C Draw a Carbon atom 6 This ring holds up to 8 electrons.
12.011atu Draw a Carbon atom

CARBON + N

CARBON + N N N N N N Have students take notes as we draw a H atom together. Then show them the next slide and ask them to tell you what the atomic number/mass would be for Helium.

Use the following information to draw a sodium atom…
11 = 11 protons = 11 electrons + N Na Sodium 22.9 atu = 23 – 11 = 12 neutrons

11 Na Use the following information to draw a sodium atom… Sodium
22.9 atu 11

SODIUM ATOM + N N N N N N N N N N N N
Have students take notes as we draw a H atom together. Then show them the next slide and ask them to tell you what the atomic number/mass would be for Helium. N N N N

13 Al aluminum Draw an aluminum atom 26.9 atu =protons = electrons
Round off and subtract atomic mass from it Review 26.9 atu 27-13 = 14 neutrons

13 Al Use the following information to draw a aluminum atom… Aluminum
26.9 atu 13

+ N N N N N N N N N N N N Aluminum N N protons = 13 electrons = 13
neutrons = 14 Holds up to 8 Holds up to 8 Holds up to 2 + N N N N N N N N N N Have students take notes as we draw a H atom together. Then show them the next slide and ask them to tell you what the atomic number/mass would be for Helium. N N N N

The Musical Table Of Elements