8 - Unit 1, Section 1 - Day 1

All atoms are made of the same three subatomic particles. What are they?

Question 1

All atoms are made of:

• Protons

• Neutrons

• Electrons

Answer 1

What are the electric charges of protons, neutrons, and electrons?

Question 2

• Protons - positive

• Neutrons - no charge (neutral)

• Electrons - negative

Answer 2

The atomic number of an atom is the number of _______________ in the nucleus of that atom.

Question 3

The atomic number is the number of protons in the nucleus of the atom.

Answer 3

The mass number of an atom is the number of protons plus the number of ____________ in the nucleus of that atom.

Question 4

The mass number is the number of protons plus the number of neutrons in an atom.

Answer 4

Where are the protons, neutrons, and electrons in an atom?

Question 5

• Protons - in the nucleus

• Neutrons - in the nucleus

• Electrons - orbiting around the nucleus

Answer 5

• Protons and neutrons are approximately the same size

• Electrons are approximately 1,000 times smaller

How Big are Protons, Neutrons, and Electrons?

Complete the exit ticket

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