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Chapter 3 Test Review. Which of the following are ions and which are atoms? Ca 2+ K Rn O 2-. Ions – Ca 2+ O 2- Atoms – K Rn. What are the different isotopes of hydrogen called?. Hydrogen, Dueterium , Tritium. What are the different types of radiation and their symbols?.

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Presentation Transcript
slide2

Which of the following are ions and which are atoms?

    • Ca2+
    • K
    • Rn
    • O2-

Ions – Ca2+ O2-

Atoms – K Rn

slide5

Which subatomic particles have a charge?

Protons – positive

Electrons - negative

slide6

What did JJ Thomson study and discover?

Electrons – because the cathode ray moved towards the positive node

slide7

What did Rutherford study and discover?

He discovered positive protons in the nucleus

slide8

What was James Chadwick’s contribution?

The neutron and its contribution to atomic mass

slide10

Where would you find electrons?

Electron cloud – surrounding the nucleus

slide11

What is an isotope?

Atoms of the same element with different #’s or neutrons

slide13

What is found in the nucleus?

Protons and neutrons

slide14

What is an ion?

An atom that has gained or lost electrons – has a charge

slide19

Complete the chart:

87 Sr+2 ion

38

slide20

Write the alpha decay for:

223Fr

87

4 He + 219 At

2 85