Inside atoms Learning Outcomes Draw a line under last lesson’s work and write today’s title in your book... Inside atoms C/W 17/01/2019 Learning Outcomes State the charges and relative masses of the three subatomic particles. Explain how atoms of different elements are different and why all atoms have no overall charge. Explain what is meant by an isotope and represent isotopes using symbols.

Engage Inside atoms State as many differences as you can about the particles shown in the images below. (There are at least 3 differences) http://ed.ted.com/lessons/just-how-small-is-an-atom

Engage Inside atoms Atom has 2 electrons while alpha particle has 0 Atom has a neutral charge, alpha particle is 2+ Atom is bigger than the alpha particle. http://ed.ted.com/lessons/just-how-small-is-an-atom

Explore Sub-atomic particle Relative mass Relative charge Proton Complete the relative mass and charge of each sub-atomic particle in the table. Sub-atomic particle Relative mass Relative charge Proton Neutron Electron 1 +1 1 0.0005 -1 The mass of an atom is almost entirely in the nucleus, so the sub-atomic particles in the nucleus have the greater relative mass. The charge of the proton is positive 1, the electron negative 1 and the neutron, neutral Use the notes below the table to complete it from the choices, 1, 0, 0.0005, +1, -1 Choose from: 1, 0, 0.0005, +1, -1

Nucleus ones! Protons and neutrons Explore Subatomic particles Protons are positive ones, neutrons are neutral ones, electrons are electric ones. What are nucleons? Nucleus ones! Protons and neutrons

Stop and Check Learning Objective By the end of the lesson, you will be able to… Learning Outcomes State the charges and relative masses of the three subatomic particles. Explain how atoms of different elements are different and why all atoms have no overall charge. Explain what is meant by an isotope and represent isotopes using symbols. Repeated cycles of the ‘teach, do, check’ cycle (slides 4-6) should be added where possible. Remember to ‘green’ the box of the objectives that have been completed.

Every atom can be shown as a symbol two numbers. Explain Every atom can be shown as a symbol two numbers. Mass number OR nucleon number Atomic number OR proton number

Explain The mass number is most of the mass of the atom and equal to the number of nucleons (protons and neutrons) Number of neutrons = mass number – atomic number. How many neutrons are there in carbon?

Work out the number of neutrons for… Explain Work out the number of neutrons for… 19 – 9 = 10 9 – 4 = 5 31 – 15 = 16

EVERY CARBON ATOM IN THE UNIVERSE HAS 6 PROTONS! Explain Atoms of a given element have the same number of protons in the nucleus. This number is unique to that element. Atomic number, or proton number EVERY CARBON ATOM IN THE UNIVERSE HAS 6 PROTONS!

Explain All atoms are neutral, that is they have no overall charge. If there were more protons than electrons in an atom, it would be positive. If there were more electrons than protons, the atom would be negative So they must have an equal number of protons and electrons.

Which 2 atoms shown represent the same element? Explain your answer.

What about the image below shows it is not a real atom? Explain Which atom? What about the image below shows it is not a real atom?

Stop and Check Learning Objective By the end of the lesson, you will be able to… Learning Outcomes State the charges and relative masses of the three subatomic particles. Explain how atoms of different elements are different and why all atoms have no overall charge. Explain what is meant by an isotope and represent isotopes using symbols. Repeated cycles of the ‘teach, do, check’ cycle (slides 4-6) should be added where possible. Remember to ‘green’ the box of the objectives that have been completed.

Cl Cl Extend Isotopes are atoms with the same number of protons… 17 17 35 Cl 17 37 Cl 17 …but a different number of neutrons.

Isotopes have different mass numbers...but the same atomic number Extend Isotopes have different mass numbers...but the same atomic number 35 Cl 17 37 Cl 17 Chlorine-35 Chlorine-37

Extend Isotopes have different mass numbers...but the same atomic number 1 H 2 H 1 3 H 1 hydrogen-1 hydrogen-2 (deuterium) hydrogen-3 (tritium)

Carbon has 6 protons. Write the symbols for carbon-13 and carbon-14 Extend Carbon has 6 protons. Write the symbols for carbon-13 and carbon-14 13 C 6 14 C 6 Carbon-13 Carbon-14

Stop and Check Learning Objective By the end of the lesson, you will be able to… Learning Outcomes State the charges and relative masses of the three subatomic particles. Explain how atoms of different elements are different and why all atoms have no overall charge. Explain what is meant by an isotope and represent isotopes using symbols. Repeated cycles of the ‘teach, do, check’ cycle (slides 4-6) should be added where possible. Remember to ‘green’ the box of the objectives that have been completed.

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