8 - Unit 1, Section 1 - Day 3

Atoms and Elements: A Review

Unit 1, Section 1

Multiple Choice

How many neutrons are in this atom of carbon?

• 6

• 8

• 14

Multiple Choice

An atom has 32 protons and 40 neutrons in its nucleus. What is the element AND what is its mass number?

• Germanium; 32

• Germanium; 40

• Germanium; 72

• Zirconium; 72

Think-Pair-Share: Compare and Contrast

• 19 protons

• 22 neutrons

Atom 2

• 19 protons

• 20 neutrons

Atom 1

Open Ended

Answer the following questions with your partner.

1. 1. Are both atoms the same element?

2. 2. Do both atoms have the same mass number?

• Isotopes are atoms of the same element, but with different numbers of neutrons

• They have:

  • The same atomic number

  • Different mass numbers

• How do we tell them apart?

Isotopes

How To Name Isotopes

​"element name" - "mass number"

Multiple Choice

How many neutrons are in an atom of uranium-238?

• 92

• 146

• 238

Multiple Choice

How many neutrons are in an atom of iridium-192?

• 77

• 115

• 192

• Neutrons make the nucleus stable

• They "glue" the protons together

• Every atom has a certain isotope that is the most stable

What MAkes EAch Isotope Different?

Classwork

Complete today's classwork on your own

Submit it in the correct box when you are done